4 1 10 aradigma positivistik dan berbasis pemecahan masalah / Husein Umar Umar, Husein Primary Author mixed material 9789797691493 Jakarta Rajawali Pers 2010 Widyono Soetjipto, Uka Wikarya Sumiharti, Yati Editor Sinaga, Herman Editor Cooper, Donald R Primary Author Emory, C William Additional Author Soetjipto, Widyono Translator Wikarya, Uka Translator mixed material 9794116688 Jakarta Erlangga 1998 Pendekatan Kuantitatif, Kualitatif, dan R&D / Sugiyono Sugiyono Primary Author mixed material 9789798433245 Bandung alfabeta 2009 Ellen G. Sitompul, Imam Nurmawan Sumiharti, Yati Editor Cooper, Donald R Primary Author Emory, C William Additional Author Nurmawan, Imam Translator Sihombing, Damos Editor Sitompul, Ellen G Translator mixed material 9794113425 Jakarta Erlangga 2007