APA (7th ed.) Citation

Warshawsky, D. (1983). Spectrum 3: A communicative course in english. Prentice Hall Regents.

Chicago Style (17th ed.) Citation

Warshawsky, Diane. Spectrum 3: A Communicative Course in English. London: Prentice Hall Regents, 1983.

MLA (9th ed.) Citation

Warshawsky, Diane. Spectrum 3: A Communicative Course in English. Prentice Hall Regents, 1983.