APA način citiranja (7. izdanje)

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

Čikaški stil citiranja (17. izdanje)

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

MLA način citiranja (8. izdanje)

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