APA (7th ed.) Citation

Topping, N. H., & Shepard, C. C. (1946). Preparation of antigens from yolk sacs infected with rickettsiae. Public Health Reports, 61, 701.

Chicago Style (17th ed.) Citation

Topping, N. H., and C. C. Shepard. "Preparation of Antigens from Yolk Sacs Infected with Rickettsiae." Public Health Reports 61 (1946): 701.

MLA (9th ed.) Citation

Topping, N. H., and C. C. Shepard. "Preparation of Antigens from Yolk Sacs Infected with Rickettsiae." Public Health Reports, vol. 61, 1946, p. 701.