APA (7th ed.) Citation

DL, M., DA, S., AB, S., & JP, V. (1980). Cefaclor--a cluster of adverse reactions. The New England journal of medicine, 303(17), 1003.

Chicago Style (17th ed.) Citation

DL, Murray, Singer DA, Singer AB, and Veldman JP. "Cefaclor--a Cluster of Adverse Reactions." The New England Journal of Medicine 303, no. 17 (1980): 1003.

MLA (9th ed.) Citation

DL, Murray, et al. "Cefaclor--a Cluster of Adverse Reactions." The New England Journal of Medicine, vol. 303, no. 17, 1980, p. 1003.