Thomsett, Michael C., author
American Management Association;, 2008
eBooks
Aldin Renata Dinta, author
2004
UI - Tesis (Membership)
Errera, Steven
PennWell Corp. c, 2002
Buku Teks
Kompas Gramedia, 2017
Buku Teks
Nina Agustina, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2001
UI - Tesis Membership