APA (7e ed.) Bronvermelding

Krashen, S. D. (1987). Principles and practice in second language acquisition. Prentice Hall International.

Chicago (17e ed.) Bronvermelding

Krashen, Stephen D. Principles and Practice in Second Language Acquisition. Nueva York: Prentice Hall International, 1987.

MLA (9e ed.) Bronvermelding

Krashen, Stephen D. Principles and Practice in Second Language Acquisition. Prentice Hall International, 1987.