Dyfyniad APA

University of Oklahoma. Bureau of Business Research. Economic development series. University of Oklahoma, Bureau of Business Research.

Dyfyniad Arddull Chicago

University of Oklahoma. Bureau of Business Research. Economic Development Series. Norman: University of Oklahoma, Bureau of Business Research.

Dyfyniad MLA

University of Oklahoma. Bureau of Business Research. Economic Development Series. University of Oklahoma, Bureau of Business Research.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.