Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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