Dyfyniad APA

Yuill, B. (1968). Supervision: Principles and techniques. George Allen & Unwin.

Dyfyniad Arddull Chicago

Yuill, Bruce. Supervision: Principles and Techniques. London: George Allen & Unwin, 1968.

Dyfyniad MLA

Yuill, Bruce. Supervision: Principles and Techniques. George Allen & Unwin, 1968.

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