Nina Insania K. Permana [and others]
PPM, 2006
Buku Teks
Kobs, Jim, author
Alex Media Komputindo, 1991
Buku Teks
Anhari Achadi, author
UI-Press, 2010
UI - Pidato
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