Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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