APA (7th ed.) Citation

GT, L., & Jr, P. R. (1998). Age, body-mass index, and mortality. The New England journal of medicine, 338(16), 1158.

Chicago Style (17th ed.) Citation

GT, Lesser, and Pierson RN Jr. "Age, Body-mass Index, and Mortality." The New England Journal of Medicine 338, no. 16 (1998): 1158.

MLA (9th ed.) Citation

GT, Lesser, and Pierson RN Jr. "Age, Body-mass Index, and Mortality." The New England Journal of Medicine, vol. 338, no. 16, 1998, p. 1158.