APA (7th ed.) Citation

de Leon, R. A. (2001). Marvels in Philippine geography. Philippine Panorama.

Chicago Style (17th ed.) Citation

de Leon, Raul A. "Marvels in Philippine Geography." Philippine Panorama 2001.

MLA (9th ed.) Citation

de Leon, Raul A. "Marvels in Philippine Geography." Philippine Panorama, 2001.

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