Gaya APA
Tampubolon, I, A. (1994).
Preliminary Survey Report for Gold Deposit In The areas Of KP. No: DU 998,999,1000 And 1001 Seringingi And Kuantan Mudik Districts Indragiri Hulu Regency - Riau Province .
Bandung:
Sub Direktorat Inventarisasi Panasbumi.
Gaya MLA
Tampubolon, Ir., Armin.
"Preliminary Survey Report for Gold Deposit In The areas Of KP. No: DU 998,999,1000 And 1001 Seringingi And Kuantan Mudik Districts Indragiri Hulu Regency - Riau Province".
Bandung:
Sub Direktorat Inventarisasi Panasbumi,
1994.
Fungsional.