APA (7th ed.) Citation
Krashen Stephen D. (1988). Second language acquisition and second language learning. Prentice-Hall.
Chicago Style (17th ed.) Citation
Krashen Stephen D. Second Language Acquisition and Second Language Learning. New York: Prentice-Hall, 1988.
MLA (9th ed.) Citation
Krashen Stephen D. Second Language Acquisition and Second Language Learning. Prentice-Hall, 1988.
Warning: These citations may not always be 100% accurate.