3 1 10 Keegan, Warren J. Additional Author Sindoro, Alexander Additional Author Widyahartono, Bob Additional Author mixed material 9798901150 Jakarta Prenhallindo 1996 Konsep ( Ekonomi ) Sindoro, Alexander Additional Author David, Fred R Additional Author Widyantoro, Agus Additional Author mixed material 9796830388 Jakarta Prenhallindo 2002 konsep ( Ekonomi ) Sindoro, Alexander Additional Author David, Fred R Additional Author Widyantoro, Agus Additional Author mixed material 9786837021 Jakarta Indeks 2004