APA (7th ed.) Citation

Lee, W. R., & Coppen, H. (1968). Simple audio-visual aids to foreign-language teaching (2. ed.). Oxford Univ. Press.

Chicago Style (17th ed.) Citation

Lee, W. R., and Helen Coppen. Simple Audio-visual Aids to Foreign-language Teaching. 2. ed. London: Oxford Univ. Press, 1968.

MLA (9th ed.) Citation

Lee, W. R., and Helen Coppen. Simple Audio-visual Aids to Foreign-language Teaching. 2. ed. Oxford Univ. Press, 1968.