Ronda, R. A. Pinoy develops environment-friendly gold mining technology.IN News. The Philippine Star.
Citazione stile Chigago Style (17a edizione)Ronda, Ranier Allan. "Pinoy Develops Environment-friendly Gold Mining Technology.IN News." The Philippine Star .
Citatione MLA (9a ed.)Ronda, Ranier Allan. "Pinoy Develops Environment-friendly Gold Mining Technology.IN News." The Philippine Star, .
Attenzione: Queste citazioni potrebbero non essere precise al 100%.