Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.