APA Citation

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

Chicago Style Citation

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

MLA Citation

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

Warning: These citations may not always be 100% accurate.