Ronda, R. A. Environment-friendly gold mining technology unveiled. Philippine star.
Cita Chicago (17th ed.)Ronda, Rainier Allan. "Environment-friendly Gold Mining Technology Unveiled." Philippine Star .
Cita MLA (9th ed.)Ronda, Rainier Allan. "Environment-friendly Gold Mining Technology Unveiled." Philippine Star, .
Atenció: Aquestes cites poden no estar 100% correctes.