Calica, A. P-Noy awards mining companies for exemplary practices. In People & Events. The Philippine Star.
Citazione stile Chigago Style (17a edizione)Calica, Aurea. "P-Noy Awards Mining Companies for Exemplary Practices. In People & Events." The Philippine Star .
Citatione MLA (9a ed.)Calica, Aurea. "P-Noy Awards Mining Companies for Exemplary Practices. In People & Events." The Philippine Star, .
Attenzione: Queste citazioni potrebbero non essere precise al 100%.