APA-viite (7. p.)

Murphy, S., Longhitano, C., Ayres, R., Cowen, P., & Harmer, C. (2006). Tryptophan supplementation induces a positive bias in the processing of emotional material in healthy female volunteers.

Chicago-viite (17. p.)

Murphy, SE, C. Longhitano, R. Ayres, P. Cowen, ja C. Harmer. Tryptophan Supplementation Induces a Positive Bias in the Processing of Emotional Material in Healthy Female Volunteers. 2006.

MLA-viite (9. p.)

Murphy, SE, et al. Tryptophan Supplementation Induces a Positive Bias in the Processing of Emotional Material in Healthy Female Volunteers. 2006.