Cita APA (7a ed.)

Frankfort, N. y. D. (1994). Spectrum. Teacher`s edition 4A: A communicative Course in English. Prentice Hall Regents.

Cita Chicago Style (17a ed.)

Frankfort, Nancy y Dye. Spectrum. Teacher`s Edition 4A: A Communicative Course in English. Estados Unidos: Prentice Hall Regents, 1994.

Cita MLA (9a ed.)

Frankfort, Nancy y Dye. Spectrum. Teacher`s Edition 4A: A Communicative Course in English. Prentice Hall Regents, 1994.