APA (7th ed.) Citation

De Leon, H. S., & Lugue, E. E. (1973). Textbook on the new Philippine constitution. Rex Book Store.

Chicago Style (17th ed.) Citation

De Leon, Hector S., and Emilio E. Lugue. Textbook on the New Philippine Constitution. Manila: Rex Book Store, 1973.

MLA (9th ed.) Citation

De Leon, Hector S., and Emilio E. Lugue. Textbook on the New Philippine Constitution. Rex Book Store, 1973.