APA

Powell L. S., . (1969). Communication and learning. New York: American Elsevier Pub. Co.

Chicago

Powell Leonard Sutherland, . 1969. Communication and learning. New York: American Elsevier Pub. Co.

Harvard

Powell L. S., . (1969). Communication and learning. New York: American Elsevier Pub. Co.

MLA

Powell Leonard Sutherland, . Communication and learning. New York: American Elsevier Pub. Co. 1969.