APA (7e ed.) Bronvermelding

Butz, W. P. (1982). Demographic challenges in America's future. Rand.

Chicago (17e ed.) Bronvermelding

Butz, William P. Demographic Challenges in America's Future. Sta. Monica, Calif: Rand, 1982.

MLA (9e ed.) Bronvermelding

Butz, William P. Demographic Challenges in America's Future. Rand, 1982.