APA-Zitierstil (7. Ausg.)

Krashen, S. D., & Terrell, T. D. (1990). The natural approach: Language acquisition in the classroom ([3. print.].). Prentice-Hall.

Chicago-Zitierstil (17. Ausg.)

Krashen, Stephen D., und Tracy D. Terrell. The Natural Approach: Language Acquisition in the Classroom. [3. print.]. New York <<[u.a.]>>: Prentice-Hall, 1990.

MLA-Zitierstil (9. Ausg.)

Krashen, Stephen D., und Tracy D. Terrell. The Natural Approach: Language Acquisition in the Classroom. [3. print.]. Prentice-Hall, 1990.