APA (7th ed.) Citation

De Leon, H. S. (1975). Student's manual on the new constitution. Rex Book Store.

Chicago Style (17th ed.) Citation

De Leon, Hector S. Student's Manual on the New Constitution. Manila: Rex Book Store, 1975.

MLA (9th ed.) Citation

De Leon, Hector S. Student's Manual on the New Constitution. Rex Book Store, 1975.