Gaya APA

Lee, W, R., Coppen, H, E. (1968). Simple audio-visual aids to foreign-language teaching (2nd ed.). enk: Oxford U.P..

Gaya MLA

Lee, William, Rowland.., Coppen, Helen, Elizabeth. "Simple audio-visual aids to foreign-language teaching". 2nd ed. enk: Oxford U.P., 1968. print.