APA (7th ed.) Citation

Mellgren, L., Walker, M., & Upshur, J. A. (1975). New horizons in English: Book 6. Addison Wesley Publishing Company.

Chicago Style (17th ed.) Citation

Mellgren, Lars, Michael Walker, and John A. Upshur. New Horizons in English: Book 6. Reading: Addison Wesley Publishing Company, 1975.

MLA (9th ed.) Citation

Mellgren, Lars, et al. New Horizons in English: Book 6. Addison Wesley Publishing Company, 1975.