APA Citation

(1985). Spectrum 4: A communicative course in English. New York, New York: Regents.

Chicago Style Citation

Spectrum 4: A Communicative Course in English. New York, New York: Regents, 1985.

MLA Citation

Spectrum 4: A Communicative Course in English. New York, New York: Regents, 1985.

Warning: These citations may not always be 100% accurate.