Gaya APA

Laufer, D, F., Kraeff, D, A. (1938). The Geology And Hydrology Of West And Central Sumba As Foundation For The Water Supply And Rural Economy . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Laufer, Dr., F.., Kraeff, Drs., A. "The Geology And Hydrology Of West And Central Sumba As Foundation For The Water Supply And Rural Economy". Bandung: Pusat Sumber Daya Geologi, 1938. Bukan Logam.