APA (7th ed.) Citation

M, C., DM, I., & RM, E. (2007). Assessment in medical education. New England Journal of Medicine, 356(4), 387.

Chicago Style (17th ed.) Citation

M, Cox, Irby DM, and Epstein RM. "Assessment in Medical Education." New England Journal of Medicine 356, no. 4 (2007): 387.

MLA (9th ed.) Citation

M, Cox, et al. "Assessment in Medical Education." New England Journal of Medicine, vol. 356, no. 4, 2007, p. 387.