Doll, R., & Peto, R. (1980). Randomised controlled trials and retrospective controls.
Cita Chicago (17th ed.)Doll, R., i R. Peto. Randomised Controlled Trials and Retrospective Controls. 1980.
Cita MLA (9th ed.)Doll, R., i R. Peto. Randomised Controlled Trials and Retrospective Controls. 1980.
Atenció: Aquestes cites poden no estar 100% correctes.