Walters, Roger L., author
McGraw-Hill, 1994
Buku Teks
Weyland, Paul, author
American Management Association, 2008
eBooks
edited by Martin P. Brown
IEEE Press, 1981
Buku Teks
edited by Jane Chapman, Marie Kinsey
Routledge, 2009
Buku Teks
Ahmad Zayadi, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2002
UI - Skripsi (Membership)