Dyfyniad APA

Lwanga, S. K., & Lemeshow, S. (1991). Sample size determination in health studies: A practical manual. World Health Organization.

Dyfyniad Arddull Chicago

Lwanga, S. Kaggwa, and Stanley Lemeshow. Sample Size Determination in Health Studies: A Practical Manual. Geneva: World Health Organization, 1991.

Dyfyniad MLA

Lwanga, S. Kaggwa, and Stanley Lemeshow. Sample Size Determination in Health Studies: A Practical Manual. World Health Organization, 1991.

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