Gaya APA

machali, A. et al (1978). Mineral Potential Evaluation Of The Nusa Tenggara Islands Regional Geochemical Prospection Of Sumba,Flores,Alor And Panter Islands . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

machali, Achmad. et al. "Mineral Potential Evaluation Of The Nusa Tenggara Islands Regional Geochemical Prospection Of Sumba,Flores,Alor And Panter Islands". Bandung: Pusat Sumber Daya Geologi, 1978. Logam.