APA (7th ed.) Citation

SP, T., DW, W., JS, V., TW, S., D, L., GJ, W., . . . S, D. (1998). Support for new policies to regulate firearms. New England Journal of Medicine, 339(12), 813.

Chicago Style (17th ed.) Citation

SP, Teret, et al. "Support for New Policies to Regulate Firearms." New England Journal of Medicine 339, no. 12 (1998): 813.

MLA (9th ed.) Citation

SP, Teret, et al. "Support for New Policies to Regulate Firearms." New England Journal of Medicine, vol. 339, no. 12, 1998, p. 813.