Hastings, Nicholas Anthony John, author
Springer International Publishing, 2015
eBooks
Nakajima, Seiichi
Productivity Press, 1988
Buku Teks
Savage, Christopher I., author
Hutchinson, 1975
Buku Teks
Koch, James V., author
Prentice-Hall, 1980
Buku Teks
Dian Puspitasari, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2013
UI - Skripsi (Membership)