Παραπομπή APA

Wengler, J. (2001). Managing energy risk: A nontechnical guide to markets and trading. Tulsa, OK: Pennwell Publishing Company.

Παραπομπή Chicago Style

Wengler, John. Managing Energy Risk: A Nontechnical Guide to Markets and Trading. Tulsa, OK: Pennwell Publishing Company, 2001.

Παραπομπή MLA

Wengler, John. Managing Energy Risk: A Nontechnical Guide to Markets and Trading. Tulsa, OK: Pennwell Publishing Company, 2001.

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