3 1 40 Cooper, Donald R. Primary Author Schindler, Pamela S. Primary Author mixed material 9780071289221 Hoboken, NJ Sams 2011 Research_methods_for_businessaskill-building_approach.jpg Cooper, Donald R. Primary Author Schindler, Pamela S. Primary Author mixed material 0072314516 Hoboken, NJ Mc Graw-Hill Book Company 2001 IMG_0470.jpg Cooper, Donald R. Primary Author Schindler, Pamela S. Primary Author mixed material 9791545723 New York McGraw-Hill Irwin 2006 Metode_Riset_Bisnis_%28_Vol._2_%29.jpg