Cita APA (7a ed.)

Frankfort, N., & Dye, J. (1994). Spectrum 4B: A communicative course in english : teacher's edition. Prentice Hall Regents.

Cita Chicago Style (17a ed.)

Frankfort, Nancy, y Joan Dye. Spectrum 4B: A Communicative Course in English : Teacher's Edition. Englewood Cliffs: Prentice Hall Regents, 1994.

Cita MLA (8a ed.)

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