Dyfyniad APA

Vernon, P. E. (1971). structure of human abilities (2nd ed.). Methuen.

Dyfyniad Arddull Chicago

Vernon, Philip E. Structure of Human Abilities. 2nd ed. London: Methuen, 1971.

Dyfyniad MLA

Vernon, Philip E. Structure of Human Abilities. 2nd ed. Methuen, 1971.

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