Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

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