APA Style

Subroto, E, A. et al (1992). The Use of 30-Norhopane Series, A Novel Carbonate Biomarker, In Source Rock to Crude Oil Correlation In The Nort Sumatra Basin, Indonesia (Proceedings Indonesian Petroleum Association , Twenty First Annual Convention, October 1992) . Jakarta: Indonesian Petroleum Association.

MLA Style

Subroto, Eddy, A.. et al. "The Use of 30-Norhopane Series, A Novel Carbonate Biomarker, In Source Rock to Crude Oil Correlation In The Nort Sumatra Basin, Indonesia (Proceedings Indonesian Petroleum Association , Twenty First Annual Convention, October 1992)". Jakarta: Indonesian Petroleum Association, 1992. Teknik.