Cita APA (7a ed.)

Krashen, S. D., & Terrell, T. D. (1983). The natural approach: Language acquisition in the classroom. Alemany Press.

Cita Chicago Style (17a ed.)

Krashen, Stephen D., y Tracy D. Terrell. The Natural Approach: Language Acquisition in the Classroom. Hayward: Alemany Press, 1983.

Cita MLA (9a ed.)

Krashen, Stephen D., y Tracy D. Terrell. The Natural Approach: Language Acquisition in the Classroom. Alemany Press, 1983.