APA aipamena

Barker, D. (1973). Practical epidemiology. Longman.

Chicago Style aipamena

Barker, Djp. Practical Epidemiology. Longman, 1973.

MLA aipamena

Barker, Djp. Practical Epidemiology. Longman, 1973.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.