Hoskison, James T., author
[publisher not identified], 1975
Buku Teks
Edited by John Barnier
Chronicle Books, 2000
Buku Referensi
Garrison, Ray h.
Irwin/McGraw-Hill, 2003
Multimedia
Bullock, Barbara, author
Lippincott , 2000
Buku Teks
Berman, Harold J., author
Little, Brown, 1953
Buku Teks