Below you will find guidance and examples of how to set out a reference to a journal article where the author has two or more works cited in the same year in the body of your work and in the reference list at the end.
Use lower case letters (a, b, etc.) to distinguish between works published in the same year by the same author(s).
Koriat (2008a) states that… this was supported by Koriat (2008b) …
The suffixes are assigned in the reference list, where these kind of references are ordered alphabetically by title (of the article, chapter, or complete work).
Koriat, A. (2008a). Easy comes, easy goes? The link between learning and remembering and its exploitation
in metacognition. Memory & Cognition, 36, 416-428. doi:10.3758/MC.36.2.416
Koriat, A. (2008b). Subjective confidence in one's answers: The consensuality principle. Journal of Experimental Psychology:
Learning, Memory, and Cognition, 34, 945-959. doi: 10.1037/2078-7318.104.22.1685