Dyfyniad APA

Alan Donagan. (1987). Choice: The essential element in human action. Routledge.

Dyfyniad Arddull Chicago

Alan Donagan. Choice: The Essential Element in Human Action. London: Routledge, 1987.

Dyfyniad MLA

Alan Donagan. Choice: The Essential Element in Human Action. Routledge, 1987.

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