APA (7th ed.) Citation

X, C., JS, K., CV, P., & NF, L. (2002). Current concepts. Cryptosporidiosis. New England Journal of Medicine, 346(22), 1723.

Chicago Style (17th ed.) Citation

X, Chen, Keithly JS, Paya CV, and LaRusso NF. "Current Concepts. Cryptosporidiosis." New England Journal of Medicine 346, no. 22 (2002): 1723.

MLA (9th ed.) Citation

X, Chen, et al. "Current Concepts. Cryptosporidiosis." New England Journal of Medicine, vol. 346, no. 22, 2002, p. 1723.