Urlanda, R. V. (2000). Mining: A sunset industry that could shine again. Philippine Panorama.
Cita Chicago (17th ed.)Urlanda, Randy V. "Mining: A Sunset Industry That Could Shine Again." Philippine Panorama 2000.
Cita MLA (9th ed.)Urlanda, Randy V. "Mining: A Sunset Industry That Could Shine Again." Philippine Panorama, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.