APA (7th ed.) Citation

Cruz, I. A., & Quiason, C. D. (2001). Fundamentals of English grammar (2001 ed.). Rex Book Store.

Chicago Style (17th ed.) Citation

Cruz, Isagani A., and Camilo D. Quiason. Fundamentals of English Grammar. 2001 ed. Manila: Rex Book Store, 2001.

MLA (9th ed.) Citation

Cruz, Isagani A., and Camilo D. Quiason. Fundamentals of English Grammar. 2001 ed. Rex Book Store, 2001.