APA ציטוט

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

Chicago Style (17th ed.) Citation

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

ציטוט MLA

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