7 1 10 BUFFA, ELWOOD S. Additional Author mixed material Jakarta Erlangga 1980 BUFFA, ELWOOD Additional Author HUTAHURUK, GUNAWAN (EDITOR) Additional Author RIVAI, R.A (PENERJEMAH) Additional Author SIREGAR, BAKRI (PENERJEMAH) Additional Author mixed material Erlangga 1992 BUFFA, ELWOOD S Primary Author mixed material Jakarta Erlangga 1983 BUFFA, ELWOOD S. Additional Author SIREGAR, BAKRI (PENERJEMAH) Additional Author RIVAI, R. A. (PENERJEMAH) Additional Author SLAMET (PENERJEMAH) Additional Author mixed material Erlangga 1980 SIREGAR, BAKRI Additional Author BUFFA, ELWOOD S. Additional Author HUATAURUK, GUNAWAN Additional Author mixed material Jakarta Erlangga 1980 BUFFA, ELWOOD S. Additional Author MAULANA, AGUS (EDITOR) Additional Author ANTARIKSO (PENERJEMAH) Additional Author SUJONO, J. P. DJOKO (PENERJEMAH) Additional Author mixed material Jakarta Erlangga 1994 SIREGAR, BAKRI Additional Author BUFFA, ELWOOD Additional Author RIVAI, R.A Additional Author SLAMET Additional Author mixed material 54100151 Erlangga 1992