Cita APA (7a ed.)

Krashen, S. D. (1985). The input hipothesis: Issues and implications (1. ed.). Longman.

Cita Chicago Style (17a ed.)

Krashen, Stephen D. The Input Hipothesis: Issues and Implications. 1. ed. Essex: Longman, 1985.

Cita MLA (8a ed.)

Krashen, Stephen D. The Input Hipothesis: Issues and Implications. 1. ed. Longman, 1985.