Ronda, R. A. Pinoy develops environment-friendly gold mining technology.IN News. The Philippine Star.
Cita Chicago Style (17a ed.)Ronda, Ranier Allan. "Pinoy Develops Environment-friendly Gold Mining Technology.IN News." The Philippine Star .
Cita MLA (9a ed.)Ronda, Ranier Allan. "Pinoy Develops Environment-friendly Gold Mining Technology.IN News." The Philippine Star, .
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