One author: (Smith 2018)
Two authors: authors’ last names are separated by “and” followed by the year.
EXAMPLE: (Rieseberg and Soltis 1991)
Three or more authors: list only the first author’s last name, followed by “et al.” and the year.
EXAMPLE: (Tsutsui et al. 2009)
If different authors have the same surname (last name), add their initials
. . .but later studies (Mardis KL and Mardis LA 2012) established that. . .
Using multiple in-text references at the same point
Provide in chronologic sequence from earliest to latest, separated by semicolons - sequence by month those published in same year or, if this information isn't available, alphabetically by author names
. . .the main proponents (Mardis and Johnson 1972; Mardis and Wyatt 1972; Baudino F 1978; Baudino K 1978; Park et al. 1980; Ury et al. 1981; Zupa 1985) concluded that. . .
Example in a ScienceDirect article:
Multiple works by the same author(s) in different years
Jackson's studies of the AIDS virus (1985, 1986) have shown that. . .
Organization as author: (American Dietetic Association 2016)
(Human Biology . . . 2002-2016). Use date range if website lists a range of dates rather than a single year.
(Organizations . . . 2016).
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