Smith, Michael, author
Cambridge University Press , 2004
Buku Teks
Pojman, Louis P., author
Wadsworth and Cengage Learning, 2012
Buku Teks
Ertiniara Novaria Prasanti, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2014
UI - Skripsi Membership
Mdm Books, 2010
Multimedia
Harvard University Press, 1999
Buku Teks