Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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