APA Style

Sagala, B. D. (1988). Quarterly progress report for the period ending June 30, 1988: Prospect 9756 . Bukittinggi: PT Antam Barisan Mining.

Chicago Style

Sagala, B. D. Quarterly progress report for the period ending June 30, 1988: Prospect 9756. Bukittinggi: PT Antam Barisan Mining, 1988. Text.

MLA Style

Sagala, B. D. Quarterly progress report for the period ending June 30, 1988: Prospect 9756. Bukittinggi: PT Antam Barisan Mining, 1988. Text.

Turabian Style

Sagala, B. D. Quarterly progress report for the period ending June 30, 1988: Prospect 9756. Bukittinggi: PT Antam Barisan Mining, 1988. Print.