Gaya APA

Laufer, F., Kraeff, A. (1957). Publikasi Keilmuan No. 33 - Seri Geologi 1957: The Geology and Hydrology of West and Central-Sumba and Their Relationship to the Water-Supply and the Rural Economy . Bandung: Pusat Djawatan Geologi.

Gaya MLA

Laufer, F.., Kraeff, A.. "Publikasi Keilmuan No. 33 - Seri Geologi 1957: The Geology and Hydrology of West and Central-Sumba and Their Relationship to the Water-Supply and the Rural Economy". Bandung: Pusat Djawatan Geologi, 1957. Text.