Gaya APA

Walker, A., Buyung, N. (1993). Preliminary Observations on The Regional Bouguer Gravity Anomaly Map of Southern Sumatra . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Walker, A.S.D., Buyung, N. "Preliminary Observations on The Regional Bouguer Gravity Anomaly Map of Southern Sumatra". Bandung: Pusat Sumber Daya Geologi, 1993. Geokimia.