APA (7th ed.) Citation

Leon, S. O. d. (1976). Security: Defense against crime. National Book Store.

Chicago Style (17th ed.) Citation

Leon, Sixto O. de. Security: Defense Against Crime. [Manila]: National Book Store, 1976.

MLA (9th ed.) Citation

Leon, Sixto O. de. Security: Defense Against Crime. National Book Store, 1976.