APA (7th ed.) Citation

BROWN, H. D. (1993). Principles of language learning and teaching.-- Ed.3. Prentice Hall.

Chicago Style (17th ed.) Citation

BROWN, H. Douglas. Principles of Language Learning and Teaching.-- Ed.3. New Jersey: Prentice Hall, 1993.

MLA (9th ed.) Citation

BROWN, H. Douglas. Principles of Language Learning and Teaching.-- Ed.3. Prentice Hall, 1993.