Gaya APA

Tampubolon, I, A. (1994). Report On The Core Drilling Exploration For Building Materials In Gunung Kerti Area Plered Purakarta West - Java . Jakarta: PT. DUTA SARANA PERKASA.

Gaya MLA

Tampubolon, Ir., Armin. "Report On The Core Drilling Exploration For Building Materials In Gunung Kerti Area Plered Purakarta West - Java". Jakarta: PT. DUTA SARANA PERKASA, 1994. Fungsional.