APA (7th ed.) Citation

KRASHEN, S. D., & TERRELL, T. D. (1984). The natural approach: Language acquisition in the classroom. Pergamon Press.

Chicago Style (17th ed.) Citation

KRASHEN, Stephen D., and Tracy D. TERRELL. The Natural Approach: Language Acquisition in the Classroom. Oxford: Pergamon Press, 1984.

MLA (9th ed.) Citation

KRASHEN, Stephen D., and Tracy D. TERRELL. The Natural Approach: Language Acquisition in the Classroom. Pergamon Press, 1984.