edited by Peter W.F. Davies
Routledge, 1997
Buku Teks
Weiss, Joseph
Wadsworth, 2009
Buku Teks
Sethi, S. Prakash
Prentice-Hall, 1991
Buku Teks
edited by Marco Grix, Tim Dare
Emerald, 2016
eBooks
Boy Ardian Pradhana Putra
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2012
UI - Skripsi Open