APA (7th ed.) Citation

KA, S. (2001). AIDS -- the first 20 years. New England Journal of Medicine, 344(23), 1764.

Chicago Style (17th ed.) Citation

KA, Sepkowitz. "AIDS -- the First 20 Years." New England Journal of Medicine 344, no. 23 (2001): 1764.

MLA (9th ed.) Citation

KA, Sepkowitz. "AIDS -- the First 20 Years." New England Journal of Medicine, vol. 344, no. 23, 2001, p. 1764.

Warning: These citations may not always be 100% accurate.