APA (7th ed.) Citation

Krashen, S. D., & Terrell, T. D. (1985). The natural approach: Language acquisition in the classroom (Repr.). Pergamon Press.

Chicago Style (17th ed.) Citation

Krashen, Stephen D., and Tracy D. Terrell. The Natural Approach: Language Acquisition in the Classroom. Repr. Oxford u.a: Pergamon Press, 1985.

MLA (9th ed.) Citation

Krashen, Stephen D., and Tracy D. Terrell. The Natural Approach: Language Acquisition in the Classroom. Repr. Pergamon Press, 1985.