Cita APA (7a ed.)

Abrams, S., & Rein, D. P. B. (1982). Spectrum 1: A communicative course in English. Regents Publishing Company.

Cita Chicago Style (17a ed.)

Abrams, Sharon, y David P. Byrd Rein. Spectrum 1: A Communicative Course in English. New York: Regents Publishing Company, 1982.

Cita MLA (9a ed.)

Abrams, Sharon, y David P. Byrd Rein. Spectrum 1: A Communicative Course in English. Regents Publishing Company, 1982.