by Gerald Smale [and others]
National Institute for Social Work, 1993
Buku Teks
Eva Fauziana
2007
UI - Tesis (Membership)
Suyanto
STIE IPWI, 2012
Artikel Jurnal
Robbins, Stephen P.
Prentice-Hall, 1997
Buku Teks
Hitt, Michael A.
Pearson, 2009
Buku Teks