Young, Margaret Levine

IDG Books Wordwide, 1993

 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

Christopher

Dinastindo, 1992

 Buku Teks

WordPerfect Corporation, 1992

 Buku Referensi

Acerson, Karen L.

McGraw-Hill, 1988

 Buku Referensi