Berger John
Penguin Books, 1977
Buku Teks
Kagan, Jerome, author
Cambridge University Press, 2009
Buku Teks
Oosterzee, Penny Van, author
Reed Books, 1997
Buku Teks
Rubin, Richard E., author
Neal-Schuman Publishers, Inc. , 1998
Buku Teks
Forouzan, Behrouz,author
Course Technology, 2008
Buku Teks