Ronda, R. A. Pinoy develops environment-friendly gold mining technology.IN News. The Philippine Star.
芝加哥风格引文Ronda, Ranier Allan. "Pinoy Develops Environment-friendly Gold Mining Technology.IN News." The Philippine Star .
MLA引文Ronda, Ranier Allan. "Pinoy Develops Environment-friendly Gold Mining Technology.IN News." The Philippine Star, .
警告：这些引文格式不一定是100％准确.