Krashen, S. D. (1985). The input hypothesis: Issues and implications. Longman.
Chicago Style (17th ed.) CitationKrashen, Stephen D. The Input Hypothesis: Issues and Implications. London ; New York: Longman, 1985.
MLA (8th ed.) CitationKrashen, Stephen D. The Input Hypothesis: Issues and Implications. Longman, 1985.
Warning: These citations may not always be 100% accurate.