Dyfyniad APA

Cook, R. C., & Lecht, J. (1968). People!: An introduction to the study of population. Columbia Books.

Dyfyniad Arddull Chicago

Cook, Robert C., and Jane Lecht. People!: An Introduction to the Study of Population. Washington: Columbia Books, 1968.

Dyfyniad MLA

Cook, Robert C., and Jane Lecht. People!: An Introduction to the Study of Population. Columbia Books, 1968.

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