APA (7e ed.) Bronvermelding

Frankel, L. B. (1970). This crowded world; an introduction to the study of population. Columbia Books.

Chicago (17e ed.) Bronvermelding

Frankel, Lillian Berson. This Crowded World; an Introduction to the Study of Population. Washington: Columbia Books, 1970.

MLA (9e ed.) Bronvermelding

Frankel, Lillian Berson. This Crowded World; an Introduction to the Study of Population. Columbia Books, 1970.