Dyfyniad APA

(1988). The state of population theory: forward from: Malthus. Basil Blackwell.

Dyfyniad Arddull Chicago

The State of Population Theory: Forward from: Malthus. New York: Basil Blackwell, 1988.

Dyfyniad MLA

The State of Population Theory: Forward from: Malthus. Basil Blackwell, 1988.

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