Sands, L. B. (1956). Audio-visual procedures in teaching. Ronald Press.
Chicago Style aipamenaSands, Lester B. Audio-visual Procedures in Teaching. New York: Ronald Press, 1956.
MLA aipamenaSands, Lester B. Audio-visual Procedures in Teaching. Ronald Press, 1956.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.