Gaya APA

Ubaghs, I, J. (1940). Report On The Excursion To The Iron Ore Fields In S.E.Kalimantan From September 30 To October 13,1940. . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Ubaghs, Ir., J.G.H.. "Report On The Excursion To The Iron Ore Fields In S.E.Kalimantan From September 30 To October 13,1940.". Bandung: Pusat Sumber Daya Geologi, 1940. Logam.