APA (7e ed.) Bronvermelding

Keyfitz, N., & Flieger, W. (1971). Population: Facts and methods of demography. W. H. Freeman.

Chicago (17e ed.) Bronvermelding

Keyfitz, Nathan, en Wilhelm Flieger. Population: Facts and Methods of Demography. San Francisco: W. H. Freeman, 1971.

MLA (8e ed.) Bronvermelding

Keyfitz, Nathan, en Wilhelm Flieger. Population: Facts and Methods of Demography. W. H. Freeman, 1971.