APA

Society of Petroleum Engineers S., . (2004). A guide to professional engineering licensure for petroleum engineers and sample P.E. Exam. [s. l]: Society of Petroleum Engineers, SPE.

Chicago

Society of Petroleum Engineers SPE, . 2004. A guide to professional engineering licensure for petroleum engineers and sample P.E. Exam. [s. l]: Society of Petroleum Engineers, SPE.

Harvard

Society of Petroleum Engineers S., . (2004). A guide to professional engineering licensure for petroleum engineers and sample P.E. Exam. [s. l]: Society of Petroleum Engineers, SPE.

MLA

Society of Petroleum Engineers SPE, . A guide to professional engineering licensure for petroleum engineers and sample P.E. Exam. [s. l]: Society of Petroleum Engineers, SPE. 2004.