Gaya APA

Leo, G, W. (1979). Geochemistry Strontium Isotope Data, and Potassium-Argon Ages of The Andesite-Rhyolite Association In The Padang Area, West Sumatra . Bandung: Direktorat Sumber Daya Mineral.

Gaya MLA

Leo, Gerhard, W.. "Geochemistry Strontium Isotope Data, and Potassium-Argon Ages of The Andesite-Rhyolite Association In The Padang Area, West Sumatra". Bandung: Direktorat Sumber Daya Mineral, 1979. Umum.