APA Style
Sagala, B. D. (1988).
Fourth quarterly report and 1987 annual review PT Antam Barisan Mining .
Bukittinggi:
PT Antam Barisan Mining.
Chicago Style
Sagala, B. D.
Fourth quarterly report and 1987 annual review PT Antam Barisan Mining.
Bukittinggi:
PT Antam Barisan Mining,
1988.
Text.
MLA Style
Sagala, B. D.
Fourth quarterly report and 1987 annual review PT Antam Barisan Mining.
Bukittinggi:
PT Antam Barisan Mining,
1988.
Text.
Turabian Style
Sagala, B. D.
Fourth quarterly report and 1987 annual review PT Antam Barisan Mining.
Bukittinggi:
PT Antam Barisan Mining,
1988.
Print.