Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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