APA (7th ed.) Citation

Hill, A. B. S., & Hill, I. D. (1991). Bradford Hill's principles of medical statistics (12th ed.). Edward Arnold.

Chicago Style (17th ed.) Citation

Hill, Austin Bradford Sir, and I. D. Hill. Bradford Hill's Principles of Medical Statistics. 12th ed. London: Edward Arnold, 1991.

MLA (9th ed.) Citation

Hill, Austin Bradford Sir, and I. D. Hill. Bradford Hill's Principles of Medical Statistics. 12th ed. Edward Arnold, 1991.