Gaya APA

Oba, N. et al (1983). Geologic Significance of Granitic Fragment Found from Pumice flow of 1883 Eruption at the Krakatau Grup Indonesia . Bandung, Jawa Barat, Indonesia: Pusat Vulkanologi dan Mitigasi Bencana Geologi.

Gaya MLA

Oba, N.. et al. "Geologic Significance of Granitic Fragment Found from Pumice flow of 1883 Eruption at the Krakatau Grup Indonesia". Bandung, Jawa Barat, Indonesia: Pusat Vulkanologi dan Mitigasi Bencana Geologi, 1983. Text.