Cooper, D. R., & Donald R. Cooper; Pamela S. Schindler. (2006). Business research methods. Boston, MA: McGraw-Hill/Irvin.
Dyfyniad Arddull ChicagoCooper, Donald R., và Donald R. Cooper; Pamela S. Schindler. Business Research Methods. Boston, MA: McGraw-Hill/Irvin, 2006.
Dyfyniad MLACooper, Donald R., và Donald R. Cooper; Pamela S. Schindler. Business Research Methods. Boston, MA: McGraw-Hill/Irvin, 2006.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.