APA (7th ed.) Citation

Dale, E. (1949). Audio-visual methods in teaching (9. print.). Dryden Press.

Chicago Style (17th ed.) Citation

Dale, Edgar. Audio-visual Methods in Teaching. 9. print. New York: Dryden Press, 1949.

MLA (9th ed.) Citation

Dale, Edgar. Audio-visual Methods in Teaching. 9. print. Dryden Press, 1949.