Estrella, V. P. Ancient goldworking technology in Butuan, Northeastern Mindanao, Philippines.
Lua i Stíl Chicago (17ú heag.)Estrella, Victor P. Ancient Goldworking Technology in Butuan, Northeastern Mindanao, Philippines. July 2017.
Lua MLA (9ú heag.)Estrella, Victor P. Ancient Goldworking Technology in Butuan, Northeastern Mindanao, Philippines.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.