Daniels, Lawrence J., 1942- , author
[American Management Association;, ], 2013
eBooks
Harper, Laurel, author
Chronicle Books, 1999
Buku Referensi
Newark, Quentin, author
RotoVision, 2002
Buku Teks
Dean, Corinna
Rockport Publishers, 2000.
Buku Teks
Nurul Hikmah, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2009
UI - Tesis (Open)