APA (7e ed.) Bronvermelding

Lwanga S.K & Lemeshow S. (1991). Sample Size determination in health studies: A practical manual. WHO.

Chicago (17e ed.) Bronvermelding

Lwanga S.K en Lemeshow S. Sample Size Determination in Health Studies: A Practical Manual. England: WHO, 1991.

MLA (9e ed.) Bronvermelding

Lwanga S.K en Lemeshow S. Sample Size Determination in Health Studies: A Practical Manual. WHO, 1991.