Dyfyniad APA

Diamond, J. M. (2011). Collapse: How societies choose to fail or succeed. Penguin Books.

Dyfyniad Arddull Chicago

Diamond, Jared M. Collapse: How Societies Choose to Fail or Succeed. New York: Penguin Books, 2011.

Dyfyniad MLA

Diamond, Jared M. Collapse: How Societies Choose to Fail or Succeed. Penguin Books, 2011.

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