Zalewski, Michal, author
No Starch Press, 2012
Buku Teks
Davis, Judy, author
Crest, 2001
Buku Teks
Willard, Wendy, author
Osborne/McGraw-Hill, 2001
Buku Referensi
Bliss, Julie B., author
Prentice-Hall, 2002
Buku Teks
Merken, Melvin, author
Saunders College Publishing, 1993
Buku Teks