Copper, B. (1974). Feedback. Hale.
Cita Chicago (17th ed.)Copper, Basil. Feedback. London: Hale, 1974.
Cita MLA (8th ed.)Copper, Basil. Feedback. Hale, 1974.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)