Cita APA (7th ed.)

Powell, L. S. (1969). Communication and learning. Pitman.

Cita Chicago (17th ed.)

Powell, Leonard Sutherland. Communication and Learning. London: Pitman, 1969.

Cita MLA (8th ed.)

Powell, Leonard Sutherland. Communication and Learning. Pitman, 1969.

Atenció: Aquestes cites poden no estar 100% correctes.