Gaya APA

International, S. (2009). A Guide to Professional Engineering Licensure for Petroleum Engineers and Sample P.E. Exam : Engineering Registration Subcommittee Society of . United States.: SPE International.

Gaya MLA

International, SPE. "A Guide to Professional Engineering Licensure for Petroleum Engineers and Sample P.E. Exam : Engineering Registration Subcommittee Society of". United States.: SPE International, 2009. Buku PPs Prodi Teknik Kimia.