Portugal, R. F., & Reyes, D. D. The domestic resource cost analysis of copper smelting in the Philippines.
Lua i Stíl Chicago (17ú heag.)Portugal, Roque Francisco, agus Daniel Delfin Reyes. The Domestic Resource Cost Analysis of Copper Smelting in the Philippines.
Lua MLA (9ú heag.)Portugal, Roque Francisco, agus Daniel Delfin Reyes. The Domestic Resource Cost Analysis of Copper Smelting in the Philippines.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.