APA (7th ed.) Citation

De Leon, H. S., & De Leon, H. J. (2010). Constitution made simple (Third edition.). Rex Book Store.

Chicago Style (17th ed.) Citation

De Leon, Hector S., and Hector Jr De Leon. Constitution Made Simple. Third edition. Manila: Rex Book Store, 2010.

MLA (9th ed.) Citation

De Leon, Hector S., and Hector Jr De Leon. Constitution Made Simple. Third edition. Rex Book Store, 2010.