- Krashen, Stephen D. Second Language Acquisition and Second Language Learning. Prentice-Hall International, 1988. Source: Article by Stephen Krashen.
- London: O.U.P. Part 5 This part starts to examine Stephen Krashen's influential hypotheses about language learning and acquisition.
- Pica, T. (2005). Second Language Acquisition Research and Applied Linguistics. Retrieved from http://repository.upenn.edu/ gse_pubs/34. Postprint version.Bulunamadı: stephen
- ...tiếp thu ngôn ngữ thứ hai một cách tự nhiên by Dr.Stephen Krashen second language acquisition and second language learning stephen krashen university.
- Krashen Stephen D. Second Language Acquisition and Second Language Learning. University of Southern California, 1981. — 154 p.
- Library of Congress Cataloging-in-Publication Data Long, Michael H. Second language acquisition and task-based language teaching / Mike Long.Bulunamadı: krashen
- How languages are learned, (3 rd ed. REFERENCES You Tube (Constantinide, M. ). (1982). Stephen Krashen on Second Language Acquisition, Part.