Jones, Harry, 1911-
Gower Press , 1974
Buku Teks
Emerald, 2016
eBooks
Kharbanda, O.P.
McGraw-Hill , 1985
Buku Teks
edited by David E. Hussey
Pergamon Press, 1983
Buku Teks
David Yonathan
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2014
UI - Tesis Membership