Dyfyniad APA

Cooper, D. R. S. (2006). Business research methods (9 edition.).

Dyfyniad Arddull Chicago

Cooper, Donald R; Schindler. Business Research Methods. 9 edition. Tata Mc Graw Hill: New Delhi, 2006.

Dyfyniad MLA

Cooper, Donald R; Schindler. Business Research Methods. 9 edition. 2006.

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