Gaya APA

Patty, E. (1964). ON THE ADDITIONAL SURVEY FOR THE CEMENT RAW MATERIALS IN THE TANDJUNG NAMAN - SALANGPUNGKUR ARFA, BOHOROK DISTRICT, NORTH SUMATRA . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Patty, E.J.. "ON THE ADDITIONAL SURVEY FOR THE CEMENT RAW MATERIALS IN THE TANDJUNG NAMAN - SALANGPUNGKUR ARFA, BOHOROK DISTRICT, NORTH SUMATRA". Bandung: Pusat Sumber Daya Geologi, 1964. Bukan Logam.