University of Oklahoma. Bureau of Business Research. Economic development series. University of Oklahoma, Bureau of Business Research.
Chicago-Zitierstil (17. Ausg.)University of Oklahoma. Bureau of Business Research. Economic Development Series. Norman: University of Oklahoma, Bureau of Business Research.
MLA-Zitierstil (8. Ausg.)University of Oklahoma. Bureau of Business Research. Economic Development Series. University of Oklahoma, Bureau of Business Research.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.