Dyfyniad APA

(1973). Models of doom: A critique of The limits to growth. New York: Universe Books.

Dyfyniad Arddull Chicago

Models of Doom: A Critique of The Limits to Growth. New York: Universe Books, 1973.

Dyfyniad MLA

Models of Doom: A Critique of The Limits to Growth. New York: Universe Books, 1973.

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