APA (7th ed.) Citation

De Leon, H. S., & Lugue, E. (1974). Textbook on the new Philippine constitution. Rex Book Store.

Chicago Style (17th ed.) Citation

De Leon, Hector S., and Emilio Lugue. Textbook on the New Philippine Constitution. Manila: Rex Book Store, 1974.

MLA (9th ed.) Citation

De Leon, Hector S., and Emilio Lugue. Textbook on the New Philippine Constitution. Rex Book Store, 1974.