Cita APA

Costinett, S., & Byrd, D. R. H. (1994). Spectrum 6: A comunicative course in English (New edition.). Upper Saddle River, N.J.: Prentice Hall Regents.

Citación estilo Chicago

Costinett, Sandra, y Donald R. H. Byrd. Spectrum 6: A Comunicative Course in English. New edition. Upper Saddle River, N.J.: Prentice Hall Regents, 1994.

Cita MLA

Costinett, Sandra, y Donald R. H. Byrd. Spectrum 6: A Comunicative Course in English. New edition. Upper Saddle River, N.J.: Prentice Hall Regents, 1994.