Gaya APA

Mines, M, O, M, A, E, D, G, O. (1986). geological report volume III Geotecnical Angineering . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Mines, Minitry, Of, Mine, And, Energy, Directorate, General, Of. "geological report volume III Geotecnical Angineering". Bandung: Pusat Sumber Daya Geologi, 1986. Batubara.