Kobs, Jim, author
Alex Media Komputindo, 1991
Buku Teks
Nina Insania K. Permana [and others]
PPM, 2006
Buku Teks
M.B. Endang Sartini Buyung Syamsudin, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1983
UI - Skripsi (Membership)
Tracy, Brian, author
Elex Media Komputindo, 2009
Buku Teks
Weaver, Lynee De, author
Elex Media Komputindo, 2002
Buku Teks