Gaya APA

Martini, H, J. (1956). Preliminary Report on Geology and Mineral-Deposits for the work to be Carried Out in Indonesia."Wedexro"April 1956 . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Martini, H., J.. "Preliminary Report on Geology and Mineral-Deposits for the work to be Carried Out in Indonesia."Wedexro"April 1956". Bandung: Pusat Sumber Daya Geologi, 1956. Batubara.