Gaya APA

Laufer, D, F., kraef, D, A. (1938). The Geology And Hydrology Of West And Central Sumba And Their Relationship To The Water Supply And The Rural Economy . Bandung: Dinas Esplorasi.

Gaya MLA

Laufer, Dr., F.., kraef, Drs., A. "The Geology And Hydrology Of West And Central Sumba And Their Relationship To The Water Supply And The Rural Economy". Bandung: Dinas Esplorasi, 1938. Bukan Logam.