Harris, Robert
Gramedia Pustaka Utama, 2009
Buku Teks
Zanker, Paul
Harvard University Press, 2001
Buku Teks
Gluck, Peter L.
Rockport Publishers, 1997
Buku Teks
Crosbie, Michael J.
Rockport Publishers, 1998
Buku Teks
Crosbie, Michael J.
Rockport Pub., 1998
Buku Teks