Gaya APA

Hadiwidjojo, M, P., Suryo, I. (1968). Volcanic Activity and its Implications; on Surface Drainege the Case of The Kelud Volcano, East Java, as an Examples . Bandung, Jawa Barat, Indonesia: Pusat Vulkanologi dan Mitigasi Bencana Geologi.

Gaya MLA

Hadiwidjojo, M.M., Purbo., Suryo, I.. "Volcanic Activity and its Implications; on Surface Drainege the Case of The Kelud Volcano, East Java, as an Examples". Bandung, Jawa Barat, Indonesia: Pusat Vulkanologi dan Mitigasi Bencana Geologi, 1968. Text.