Παραπομπή σε μορφή APA (7η εκδ.)
Society of Petroleum Engineers (U.S.) & ebrary, Inc. (2011). A guide to professional engineering licensure for petroleum engineers and sample P.E. exam (11th ed.). Society of Petroleum Engineers.
Παραπομπή σε μορφή Chicago (17η εκδ.)
Society of Petroleum Engineers (U.S.) και Inc ebrary. A Guide to Professional Engineering Licensure for Petroleum Engineers and Sample P.E. Exam. 11th ed. [Richardson, TX ]: Society of Petroleum Engineers, 2011.
Παραπομπή σε μορφή MLA (9th εκδ.)
Society of Petroleum Engineers (U.S.) και Inc ebrary. A Guide to Professional Engineering Licensure for Petroleum Engineers and Sample P.E. Exam. 11th ed. Society of Petroleum Engineers, 2011.
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