10 1 40 Sugiyono Additional Author mixed material 9798433369 Bandung Alfabeta 1999-2003 Metode_Peneitian_Bisnis.jpg A Skill-Building Approach Uma Sekaran Primary Author BOUGIE, Roger Additional Author mixed material 9781119942252 United Kingdom John Wiley and Sons LTD 2013 3519.jpg.jpg Cooper, Donald R. Primary Author Schindler, Pamela S. Primary Author mixed material 9780071289221 Hoboken, NJ Sams 2011 Research_methods_for_businessaskill-building_approach.jpg Zikmund, William G. Primary Author mixed material 0030750199 San Diego,California The Dryden Press 1991 Research_Methods_For_Business.jpg EMORY,C.William Additional Author mixed material London Richard D.Irwin ,Inc 1980 Research_methods_for_businessaskill-building_approach.jpg Uma Sekaran Primary Author mixed material 0471203661 New York john wiley- sons, inc 2003 uma_sekaran.jpg askill-building approach SEKARAN, Uma Primary Author BOUGIE, Roger Primary Author mixed material 9780470744796 Hoboken, NJ John Wiley 2010 IMG_0481.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 HAAS, Kenneth B. Additional Author Ernest, John W. Primary Author mixed material California GLENCOE PRESS 1969 Davis, Duane Primary Author Cosenza, Robert M. Primary Author mixed material 0534932495 1988 Wadsworth Publishing Company 1993