Dyfyniad APA

Siann, G. (1980). Education Psychology in a changing world. George Allen & Unwin.

Dyfyniad Arddull Chicago

Siann, Geerda. Education Psychology in a Changing World. London: George Allen & Unwin, 1980.

Dyfyniad MLA

Siann, Geerda. Education Psychology in a Changing World. George Allen & Unwin, 1980.

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