Aamodt, Michael G., author
Wadsworth and Cengage Learning, 2013
Buku Teks
Aamodt, Michael G., author
Cengage Learning, 2016
Buku Teks
Dewi Sri Sotijaningsih, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2003
UI - Tesis (Membership)
Cole, Marilyn B., author
Slack Incorporated, 2008
Buku Teks
Ullman, Neil R., author
John Wiley & Sons, 1978
Buku Teks