Axelrod, Jerrold L., author
McGraw-Hill , 2000
Buku Teks
Axelrod, Jerrold L., author
McGraw-Hill , 2000
Multimedia
edited David E. Clark
Lane Publishing, 1980
Buku Teks
Reed, Mortimer P.
Prentice-Hall, 1983
Buku Teks
Davies, Colin, 1929-, author
W.W. Norton, 2006
Buku Referensi