Berenbaum, May R., author
Addison-Wesley, 1995
Buku Teks
Hobson, Art, author
John Wiley & Sons, 1982
Buku Teks
Boardman, Harry, author
Voice of America, 1974
Buku Teks
Blum, Mark
Chronicle Books, 1998
Buku Referensi
Bem, Daryl J.
Brooks/Cole, 1970
Buku Teks