Gaya APA

Kemmerling, G, L, L. (1921). Fertility Of The Merapi Products Sand Transportation Of The Neutral Woro Triangle, Merapi Volcano 1921 ., The Ladufield Of The Kali Batang, Merapi Volcano. . Bandung, Jawa Barat, Indonesia: Pusat Vulkanologi dan Mitigasi Bencana Geologi.

Gaya MLA

Kemmerling, G., L., L.. "Fertility Of The Merapi Products Sand Transportation Of The Neutral Woro Triangle, Merapi Volcano 1921 ., The Ladufield Of The Kali Batang, Merapi Volcano.". Bandung, Jawa Barat, Indonesia: Pusat Vulkanologi dan Mitigasi Bencana Geologi, 1921. Text.