If the work you are citing has three to five authors, list all the authors’ names the first time you cite the source. In subsequent citations, use the first author’s name followed by the abbreviation et al. (Et al. is short for et alia, the Latin phrase for “and others.”)
Henderson, Davidian, and Degler (2010) surveyed 350 smokers aged 18 to 30.
One survey, conducted among 350 smokers aged 18 to 30, included a detailed questionnaire about participants’ motivations for smoking (Henderson, Davidian, & Degler, 2010).
Note that these examples follow the same ampersand conventions as sources with two authors. Again, use the ampersand only when listing authors’ names in parentheses.
As Henderson et al. (2010) found, some young people, particularly young women, use smoking as a means of appetite suppression.
Disturbingly, some young women use smoking as a means of appetite suppression (Henderson et al., 2010).
Note how the phrase et al. is punctuated. No period comes after et, but al. gets a period because it is an abbreviation for a longer Latin word. In parenthetical references, include a comma after et al. but not before. Remember this rule by mentally translating the citation to English: “Henderson and others, 2010.”
- 1772 reads