Dyfyniad APA

Cipolla, C. M. (1967). The economic history of world population (Fourth edition.). Penguin Books.

Dyfyniad Arddull Chicago

Cipolla, Carlo M. The Economic History of World Population. Fourth edition. Harmondsworth: Penguin Books, 1967.

Dyfyniad MLA

Cipolla, Carlo M. The Economic History of World Population. Fourth edition. Penguin Books, 1967.

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