Dyfyniad APA

Livi Bacci, M., & Ipsen, C. (1992). A concise history of world population. Blackwell.

Dyfyniad Arddull Chicago

Livi Bacci, Massimo, and Carl Ipsen. A Concise History of World Population. Cambridge, MA: Blackwell, 1992.

Dyfyniad MLA

Livi Bacci, Massimo, and Carl Ipsen. A Concise History of World Population. Blackwell, 1992.

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