Keoghan, Phil, author
Bhuana Ilmu Populer, 2004
Buku Teks
Jack O'Gorman, editor
[American Management Association, ], 2008
eBooks
Shaw, Gareth, author
Leicester University Press, 1988
Buku Referensi
Titis Hutami, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1996
UI - Skripsi (Membership)
Darsis Humah, author
2005
UI - Tesis (Membership)