Neukrug, Ed, author
Thomson Learning, Inc., 2004
Buku Teks
Neukrug, Edward S., author
Cengage Learning, 2017
Buku Teks
Brody, Ralph, author
Sage Publications, 2005
Buku Teks
Cambridge University Press, 2007
eBooks
Herjuno Ndaru Kinasih, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2011
UI - Tesis (Open)