Dyfyniad APA

Vernon, P. E. (1961). The structure of human abilities. John Wiley.

Dyfyniad Arddull Chicago

Vernon, Philip E. The Structure of Human Abilities. London: John Wiley, 1961.

Dyfyniad MLA

Vernon, Philip E. The Structure of Human Abilities. John Wiley, 1961.

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