Dyfyniad APA

Cooper, D. R. (2001). Business research methods. McGraw-Hill/Irwin.

Dyfyniad Arddull Chicago

Cooper, Donald R. Business Research Methods. Boston: McGraw-Hill/Irwin, 2001.

Dyfyniad MLA

Cooper, Donald R. Business Research Methods. McGraw-Hill/Irwin, 2001.

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