5 1 10 Penelitian Operasional Teori Dan Praktek Siagian, P Additional Author mixed material 9798034740 Jakarta Universitas Indonesia 1987 Metode Dan Analisis Penelitian Mencari Hubungan Jilid I Walizer, Michael H. Additional Author Sadiman, Arief Additional Author mixed material Jakarta Erlangga 1993 Metode Dan Analisis Penelitian Mencari Hubungan Jilid I Walizer, Michael H. Additional Author Sadiman, Arief Additional Author mixed material Jakarta Erlangga 1993 Penelitian Operasional Teori Dan Praktek Siagian, P Additional Author mixed material 9798034740 Jakarta Universitas Indonesia 1987 metode penelitian kualitatif manajemeen ( penelitian th. Putra, Nusa Primary Author mixed material 9789797695315 Jakarta radja Grafindo 2013