4 1 10 Tulus TH Tambunan Primary Author mixed material 9789794506479 Yogyakarta Graha Ilmu 2011 Hendarto,Hartiti Primary Author Tulusharyono Primary Author mixed material 9794422231 Jakarta PPM 2008 sekretaris_profesional.png.png Tulus Primary Author Tambunan Primary Author mixed material 9789794505564 Bogor Ghalia Indonesia 2009 perekonomian_indonesia.png.png Tulus,Robby Primary Author Karlena,Yuspita Primary Author Munaldus Primary Author mixed material 9786020421544 Jakarta Elek Media Komputindo 2017