Gaya APA

Tampubolon, I, A. (1994). Preliminary Survey Report For Gold Deposit In The Areas Of Kp. No. Du 998, 999, 1000 And 1001 Sengingi And Kuantan Mudik Districts Indragiri Hulu Regency - Riau Province . Bandung: Direktorat Sumber Daya Mineral.

Gaya MLA

Tampubolon, Ir., Armin. "Preliminary Survey Report For Gold Deposit In The Areas Of Kp. No. Du 998, 999, 1000 And 1001 Sengingi And Kuantan Mudik Districts Indragiri Hulu Regency - Riau Province". Bandung: Direktorat Sumber Daya Mineral, 1994. Fungsional.