Cita APA (7th ed.)

Dale, E. (1959). Audio-visual methods in teaching (2a. ed.). Henry Holt and Company.

Cita Chicago (17th ed.)

Dale, Edgar. Audio-visual Methods in Teaching. 2a. ed. Nueva York: Henry Holt and Company, 1959.

Cita MLA (9th ed.)

Dale, Edgar. Audio-visual Methods in Teaching. 2a. ed. Henry Holt and Company, 1959.