APA (7e ed.) Bronvermelding

Frankel, L. B., & Bureau, P. R. (1970). This crowded world: An introduction to the study of population. Columbia Books.

Chicago (17e ed.) Bronvermelding

Frankel, Lilian B., en Population Reference Bureau. This Crowded World: An Introduction to the Study of Population. Washington D.C: Columbia Books, 1970.

MLA (9e ed.) Bronvermelding

Frankel, Lilian B., en Population Reference Bureau. This Crowded World: An Introduction to the Study of Population. Columbia Books, 1970.