APA Style
Sagala, B. D, Soemantri, H.. (1988).
Quarterly progress report for the period ending September 30, 1988: Prospect 9756 .
Bukittinggi:
PT Antam Barisan Mining.
Chicago Style
Sagala, B. D, Soemantri, H..
Quarterly progress report for the period ending September 30, 1988: Prospect 9756.
Bukittinggi:
PT Antam Barisan Mining,
1988.
Text.
MLA Style
Sagala, B. D, Soemantri, H..
Quarterly progress report for the period ending September 30, 1988: Prospect 9756.
Bukittinggi:
PT Antam Barisan Mining,
1988.
Text.
Turabian Style
Sagala, B. D, Soemantri, H..
Quarterly progress report for the period ending September 30, 1988: Prospect 9756.
Bukittinggi:
PT Antam Barisan Mining,
1988.
Print.