Jackson, Grdon E., author
Prentice-Hall, 1993
Buku Referensi
Juergensmeyer, Julian Conrad, author
Little, Brown, 1982
Buku Teks
Juergensmeyer, Julian Conrad, author
Little, Brown, 1982
Buku Teks
Hills, George S., author
Garland Pubishing, 1982
Buku Teks
Brent, Nancy J., author
W.B.Sounders company , 2001
Buku Teks