Yauch, W. A. (1957). Helping teachers understand principals. Appleton-Century-Crofts.
Cita Chicago (17th ed.)Yauch, Wilbur Alden. Helping Teachers Understand Principals. New York: Appleton-Century-Crofts, 1957.
Cita MLA (9th ed.)Yauch, Wilbur Alden. Helping Teachers Understand Principals. Appleton-Century-Crofts, 1957.
Atenció: Aquestes cites poden no estar 100% correctes.