Dyfyniad APA

Cooper, D. R. S. (2012). Business Research Methods (11th ed.). McGraw Hill.

Dyfyniad Arddull Chicago

Cooper, Donald R; Schindler. Business Research Methods. 11th ed. New Delhi: McGraw Hill, 2012.

Dyfyniad MLA

Cooper, Donald R; Schindler. Business Research Methods. 11th ed. McGraw Hill, 2012.

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