Use of Authors' Names
Always mention the author's name—either in the text itself or in the parenthetical citation—unless no author is provided.
If the author's name is mentioned in the text
If the author's name is used in the text introducing the source material, then cite the page number(s) in parentheses:
Branscomb argues that "it's a good idea to lurk (i.e., read all the messages without contributing anything) for a few weeks, to ensure that you don't break any of the rules of netiquette" (7) when joining a listserv.
If the author's name is not mentioned in the text
If the author's name is not used in the sentence introducing the source material, then include the author's last name in the parenthetical citation before the page number(s). Note that no comma appears between the author's name and the page number(s).
The modern world requires both the ability to concentrate on one thing and the ability to attend to more than one thing at a time: "Ideally, each individual would cultivate a repertoire of styles of attention, appropriate to different situations, and would learn how to embed activities and types of attention one within another" (Bateson 97).
If there is more than one work by the same author
If a document uses more than one work by an individual author, include an abbreviated form of the title of the work in addition to the author's name and relevant page number(s). Separate the author's name and the title with a comma:
Hypertextuality makes text borderless as it "redefines not only beginning and endings of the text but also its borders—its sides, as it were" (Landow, Hypertext 2.0 79).
If two authors have the same last name
If the document uses two sources by authors with the same last name, include the author's first name in the text or the parenthetical citation:
Tom Peters talks about a company that facilitates employees' renewal by shutting down its factory for several hours per week while teams work through readings on current business topics (57).
If there are two or three authors
If a source has two or three authors, place all of the authors' last names in the text or in the parenthetical citation:
A team can be defined as "a small number of people with complementary skills who are committed to a common purpose, performance goals, and approach for which they hold themselves mutually accountable" (Katzenbach and Smith 45).
If there are four or more authors
If a source has four or more authors, include the first author's last name followed by et al. (Latin for and others), either in the text or in the parenthetical citation. You can also name all of the authors:
Cogdill et al. argue that "making backchannel overtly available for study would require making its presence and content visible and its content persist, affecting the nature of the backchannel and raising social and ethical issues" (109).
If the source has a corporate author
If a source has a corporate author, include the author's name and the page(s). If the corporate author's name is long, it should be included in the text rather than the parentheses:
According to the Centre for Development and Population Activities, interest in gender roles and responsibilities over the past decade has been "driven by the realization that women often do not benefit from development activities and in some cases become even poorer and more marginalized" (3).
If no author is identified
If a source does not include an author's name, substitute for the author's name the title or an abbreviated title in the text or parenthetical citation. Underline the title if the source is a book; if the source is an article, use quotation marks:
The use of Customer Relationship Management (CRM) systems has grown substantially over the past five years as companies attempt to adapt to customer needs and to improve their profitability ("Making CRM Work").
Taken from:
http://leo.stcloudstate.edu/research/mlaparen.html