APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (8:e uppl.)

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