Citazione Stile APA (7a Edizione)

Spears, H. (1953). Improving the supervision of instruction. Prentice-Hall.

Citazione stile Chigago Style (17a edizione)

Spears, Harold. Improving the Supervision of Instruction. New York, New York: Prentice-Hall, 1953.

Citatione MLA (9a ed.)

Spears, Harold. Improving the Supervision of Instruction. Prentice-Hall, 1953.