APA (7th ed.) Citation

Lancion, C. M., & De Guzman, R. Fast facts about Philippine provinces.

Chicago Style (17th ed.) Citation

Lancion, Conrado M., and Rey De Guzman. Fast Facts About Philippine Provinces.

MLA (9th ed.) Citation

Lancion, Conrado M., and Rey De Guzman. Fast Facts About Philippine Provinces.

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