Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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

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