APA (7th ed.) Citation

Warshawsky, D., & Byrd, D. R. H. (1994). Spectrum: A communicative course in english: student book. Prentice Hall Regents Pearson Education.

Chicago Style (17th ed.) Citation

Warshawsky, Diane, and Donald R. H. Byrd. Spectrum: A Communicative Course in English: Student Book. New Jersey, EUA: Prentice Hall Regents Pearson Education, 1994.

MLA (9th ed.) Citation

Warshawsky, Diane, and Donald R. H. Byrd. Spectrum: A Communicative Course in English: Student Book. Prentice Hall Regents Pearson Education, 1994.