Mason, Audrey
Patrick Stephens Limited, 1992
Buku Teks
Richman, Larry, author
American Management Association, 2006
eBooks
Hajek, Victor G.
Erlangga, 1988
Buku Teks
Fikri Ramadhan Lubis, author
Fakultas Teknik Universitas Indonesia, 2018
UI - Tesis (Membership)
Hackos, JoAnn T., author
John Wiley & Sons, 1994
Buku Referensi