FEUI - Management Research Center (MRC), {s.a}
Majalah, Jurnal, Buletin
Depok : FISIP UI
Majalah, Jurnal, Buletin
SMARTaxes Publishing member of Lembaga Manajemen Formasi,
Majalah, Jurnal, Buletin
Castle, James W.
Castle Group, 1997
Buku Referensi
LIPI Press,
Majalah, Jurnal, Buletin