Lwanga S.K & Lemeshow S. (1991). Sample Size determination in health studies: A practical manual. WHO.
Chicago-čujuhus (17. p.)Lwanga S.K juo Lemeshow S. Sample Size Determination in Health Studies: A Practical Manual. England: WHO, 1991.
MLA-čujuhus (9. p.)Lwanga S.K juo Lemeshow S. Sample Size Determination in Health Studies: A Practical Manual. WHO, 1991.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.