APA (7th ed.) Citation

AM, E. (2007). Pay for performance at the tipping point. New England Journal of Medicine, 356(5), 515.

Chicago Style (17th ed.) Citation

AM, Epstein. "Pay for Performance at the Tipping Point." New England Journal of Medicine 356, no. 5 (2007): 515.

MLA (9th ed.) Citation

AM, Epstein. "Pay for Performance at the Tipping Point." New England Journal of Medicine, vol. 356, no. 5, 2007, p. 515.