University of Oklahoma. Center for Economic and Management Research. Review of regional economics and business. University of Oklahoma Center for Economic and Management Research.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)University of Oklahoma. Center for Economic and Management Research. Review of Regional Economics and Business. Norman, Okla.: University of Oklahoma Center for Economic and Management Research.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)University of Oklahoma. Center for Economic and Management Research. Review of Regional Economics and Business. University of Oklahoma Center for Economic and Management Research.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.