APA (7th ed.) Citation

Tejero, E. G. (2008). Doorways to English language proficiency: A self-improvement program. National Book Store.

Chicago Style (17th ed.) Citation

Tejero, Erlinda Galero. Doorways to English Language Proficiency: A Self-improvement Program. Mandaluyong City: National Book Store, 2008.

MLA (9th ed.) Citation

Tejero, Erlinda Galero. Doorways to English Language Proficiency: A Self-improvement Program. National Book Store, 2008.