Christopher, author
Dinastindo, 1992
Buku Teks
Young, Margaret Levine, author
IDG Books Wordwide, 1993
Buku Teks
McClure, Rhyder, author
Brady, 1990
Buku Teks
Christoper, author
Dinastindo, 1992
Buku Teks
Stephen Harris, Virginia Andrerson, Glen Banner, Valerie Bloch, Barbara Bouton, Forrest Haouletts, Anthony Keller, April D. Sessions, Dan L. Sessions, Rob Tidroew, editor
NRP, 1993
Buku Referensi