APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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