APA aipamena

Doll, R., & Peto, R. (1980). Randomised controlled trials and retrospective controls.

Chicago Style aipamena

Doll, R., and R. Peto. Randomised Controlled Trials and Retrospective Controls. 1980.

MLA aipamena

Doll, R., and R. Peto. Randomised Controlled Trials and Retrospective Controls. 1980.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.