APA

Exton W., . (1947). Audiovisual aids to instruction. New York: McGraw-Hill Book Co.

Chicago

Exton William, . 1947. Audiovisual aids to instruction. New York: McGraw-Hill Book Co.

Harvard

Exton W., . (1947). Audiovisual aids to instruction. New York: McGraw-Hill Book Co.

MLA

Exton William, . Audiovisual aids to instruction. New York: McGraw-Hill Book Co. 1947.