Beer, David, author
John Wiley & Sons, 2005
Buku Teks
Charles E. Tutle Co.Inc, 1959,
Buku Referensi
Axelrod, Rise B.
1997
Multimedia
Axelrod, Rise B., author
St. Martin's Press, 1997
Buku Referensi
Axelrod, Rise B., author
St. Martin Press, 1997
Buku Referensi