Dyfyniad APA

Pickering, G. (1967). The challenge to education. Penguin.

Dyfyniad Arddull Chicago

Pickering, George. The Challenge to Education. Harmandsworth, Eng.: Penguin, 1967.

Dyfyniad MLA

Pickering, George. The Challenge to Education. Penguin, 1967.

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