Cita APA (7th ed.)

Hill, A. B., & Hill, I. D. (1991). Bradford Hill's Principles of Medical Statistics (12th ed.). B. I. Publications.

Cita Chicago (17th ed.)

Hill, Austin Bradford, i I. D. Hill. Bradford Hill's Principles of Medical Statistics. 12th ed. New Delhi: B. I. Publications, 1991.

Cita MLA (9th ed.)

Hill, Austin Bradford, i I. D. Hill. Bradford Hill's Principles of Medical Statistics. 12th ed. B. I. Publications, 1991.