APA (7th ed.) Citation

Krashen, S. D. (1985). The input hypothesis: Issues and implications. Longman.

Chicago Style (17th ed.) Citation

Krashen, Stephen D. The Input Hypothesis: Issues and Implications. London ; New York: Longman, 1985.

MLA (8th ed.) Citation

Krashen, Stephen D. The Input Hypothesis: Issues and Implications. Longman, 1985.

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