Emerald, 2016
eBooks
Jones, Harry, 1911-
Gower Press , 1974
Buku Teks
Silitinga, Rickson
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2002
UI - Tesis Membership
Achmad Rizki Sadikin
Fakultas Teknik Universitas Indonesia, 2013
UI - Tesis Membership
Hussey, David E.
Pergamon Press, 1976
Buku Teks