Universitas Indonesia, 2002
UI - Skripsi (Membership)
Universitas Indonesia, 2006
UI - Skripsi (Membership)
Daitel, H.M., author
Prentice-Hall, 2001
Buku Teks
Riri Ananingdyah, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2014
UI - Skripsi (Membership)
Gates, Bill, author
Gramedia, 2000
Buku Teks