Sıdak, J., & Spulber, D. F. (1996). Protecting competition from the postal monopoly. The American Enterprise Institute.
Chicago Style (17. basım) AtıfSıdak, J.Gregory, ve Daniel F. Spulber. Protecting Competition from the Postal Monopoly. Washington D.C.: The American Enterprise Institute, 1996.
MLA (9th ed.) AtıfSıdak, J.Gregory, ve Daniel F. Spulber. Protecting Competition from the Postal Monopoly. The American Enterprise Institute, 1996.
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