Gaya APA

Djumarna, U., S, K. (1969). Limestone Deposits In Riau Davatan Djambi Northern Part Of South Sumatra, Central & Southeast Kalimantan And The Southern Part Of West Irian . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Djumarna, U.., S, Kadar. "Limestone Deposits In Riau Davatan Djambi Northern Part Of South Sumatra, Central & Southeast Kalimantan And The Southern Part Of West Irian". Bandung: Pusat Sumber Daya Geologi, 1969. Bukan Logam.