Gaya APA

IPA, . (1998). Indonesian Petroleum Association : Proceedings Twenty Sixth Anual Convention Jakarta, May 18-20, 1998 Vol : I . Jakarta: Indonesian Petroleum ssocoiation.

Gaya MLA

IPA, . "Indonesian Petroleum Association : Proceedings Twenty Sixth Anual Convention Jakarta, May 18-20, 1998 Vol : I". Jakarta: Indonesian Petroleum ssocoiation, 1998. Text.