Jakarta Consulting Group, [date of publication not identified]
Buku Teks
A.B. Setiaji
Yogyakarta Kanisius 2002,
Buku Teks
Winardi, author
KIecana, 2006
Buku Teks
Aguinis, Herman, author
Pearson Education International, 2009
Buku Teks
Humayunbosha, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2004
UI - Tesis (Membership)