APA (7th ed.) Citation

HR, L., S, C., BJ, S., GS, G., JH, G., & RJ, W. (1984). The effects of tryptophan and tyrosine on human mood and performance. Psychopharmacology bulletin, 20(3), 595.

Chicago Style (17th ed.) Citation

HR, Lieberman, Corkin S, Spring BJ, Garfield GS, Growdon JH, and Wurtman RJ. "The Effects of Tryptophan and Tyrosine on Human Mood and Performance." Psychopharmacology Bulletin 20, no. 3 (1984): 595.

MLA (9th ed.) Citation

HR, Lieberman, et al. "The Effects of Tryptophan and Tyrosine on Human Mood and Performance." Psychopharmacology Bulletin, vol. 20, no. 3, 1984, p. 595.