APA (7th ed.) Citation

Little, D., & Esch, E. (1989). Self-access Systems for language learning: A practical guide. Authentik.

Chicago Style (17th ed.) Citation

Little, David, and Edith Esch. Self-access Systems for Language Learning: A Practical Guide. Dublin: Authentik, 1989.

MLA (9th ed.) Citation

Little, David, and Edith Esch. Self-access Systems for Language Learning: A Practical Guide. Authentik, 1989.