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