APA (7th ed.) Citation

Smith, B., & Prockop, D. J. (1962). Central-nervous-system effects of ingestion of L-tryptophan by normal subjects. The New England journal of medicine, 267, 1338. https://doi.org/10.1056/NEJM196212272672603

Chicago Style (17th ed.) Citation

Smith, B., and D J. Prockop. "Central-nervous-system Effects of Ingestion of L-tryptophan by Normal Subjects." The New England Journal of Medicine 267 (1962): 1338. https://doi.org/10.1056/NEJM196212272672603.

MLA (9th ed.) Citation

Smith, B., and D J. Prockop. "Central-nervous-system Effects of Ingestion of L-tryptophan by Normal Subjects." The New England Journal of Medicine, vol. 267, 1962, p. 1338, https://doi.org/10.1056/NEJM196212272672603.