APA (7th ed.) Citation

P, M., GK, I., IM, W., N, R., DA, B., & B, B. (2003). Adolescent depression. New England Journal of Medicine, 348(5), 473.

Chicago Style (17th ed.) Citation

P, McGettigan, Isbister GK, Whyte IM, Rappaport N, Brent DA, and Birmaher B. "Adolescent Depression." New England Journal of Medicine 348, no. 5 (2003): 473.

MLA (9th ed.) Citation

P, McGettigan, et al. "Adolescent Depression." New England Journal of Medicine, vol. 348, no. 5, 2003, p. 473.