Cita APA

Cook, R. C., & Lecht, C. (1968). People! an introduction to the study of population. Washington, D.C.: Columbia.

Citación estilo Chicago

Cook, Robert C., y Cook Lecht. People! an Introduction to the Study of Population. Washington, D.C.: Columbia, 1968.

Cita MLA

Cook, Robert C., y Cook Lecht. People! an Introduction to the Study of Population. Washington, D.C.: Columbia, 1968.