APA (7th ed.) Citation
Krueger, H., Eddy, N. B., & Sumwalt, M. (1941). The Pharmacology of the opium alkaloids. U.S.Publ. Health Service.
Chicago Style (17th ed.) Citation
Krueger, Hugo, Nathan B. Eddy, and Margaret Sumwalt. The Pharmacology of the Opium Alkaloids. Washington: U.S.Publ. Health Service, 1941.
MLA (9th ed.) Citation
Krueger, Hugo, et al. The Pharmacology of the Opium Alkaloids. U.S.Publ. Health Service, 1941.
Warning: These citations may not always be 100% accurate.