Dyfyniad APA

Haller, S. F. (2002). Apocalypse soon?: Wagering on warnings of global catastrophe. McGill-Queen's University Press.

Dyfyniad Arddull Chicago

Haller, Stephen F. Apocalypse Soon?: Wagering on Warnings of Global Catastrophe. Montreal: McGill-Queen's University Press, 2002.

Dyfyniad MLA

Haller, Stephen F. Apocalypse Soon?: Wagering on Warnings of Global Catastrophe. McGill-Queen's University Press, 2002.

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