The author-year notation system is required; do not use numbered notation.

Examples:
(Murphy, 2001)

For within-text citations of papers with two authors, name both.

Examples:
(Murphy and Smith, 2001)

With three or more authors, use 'et al.'

Examples:
(Murphy et al., 2001)

For two or more articles using the same within-text citation, add a distinguishing lowercase letter to the year in both the text and references list. Separate citations with a semicolon.

Examples:
(Murphy and Wong, 2001, 2001b; Murphy et al., 2001)

*For citations of multiple works by the same authors, the author names do not need to be repeated.

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