Jacobus W. Danudibroto, author
1990
UI - Tesis (Membership)
Buchari Alma, author
Alfabeta , 2014
Buku Teks
Trisakti International Center for Service studies FE-Usakti, 2006
Majalah, Jurnal, Buletin
Rambat Lupiyoadi, author
Salemba Empat, 2013
Buku Teks
Rusalina Dwiwanti, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2000
UI - Tesis Membership