"cooper, donald r. "
business research methods: / donald.r. cooper - 10 ed. - boston : mcgraw hill 2008. - "xxii, 746p.; 28 cm." - irwin .
978 007 126333 7
--
658. 57 coo
business research methods: / donald.r. cooper - 10 ed. - boston : mcgraw hill 2008. - "xxii, 746p.; 28 cm." - irwin .
978 007 126333 7
--
658. 57 coo