Doll, R., & Peto, R. (1980). Randomised controlled trials and retrospective controls.
Chicago-čujuhus (17. p.)Doll, R., juo R. Peto. Randomised Controlled Trials and Retrospective Controls. 1980.
MLA-čujuhus (9. p.)Doll, R., juo R. Peto. Randomised Controlled Trials and Retrospective Controls. 1980.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.