APA (7th ed.) Citation

De Leon, S. O. (1978). Police intelligence guide. National Book Store.

Chicago Style (17th ed.) Citation

De Leon, Sixto O. Police Intelligence Guide. [Manila]: National Book Store, 1978.

MLA (9th ed.) Citation

De Leon, Sixto O. Police Intelligence Guide. National Book Store, 1978.

Warning: These citations may not always be 100% accurate.