Urlanda, R. V. (2000). Mining: A sunset industry that could shine again. Philippine Panorama.
芝加哥风格引文Urlanda, Randy V. "Mining: A Sunset Industry That Could Shine Again." Philippine Panorama 2000.
MLA引文Urlanda, Randy V. "Mining: A Sunset Industry That Could Shine Again." Philippine Panorama, 2000.
警告：这些引文格式不一定是100％准确.