Reference : wordperfect presentations version 2.0
WordPerfect Corporation, 1992
 Buku Referensi
Ranz, John H.
Anderson?s manual for notaries public; a complete guide for notaries public and commissioners of deeds, with forms, charts, and instructions for use in all States/ John H. Ranz
W.H. Anderson Co., 1966
 Buku Teks
All the world's a stage
 Artikel Jurnal
Designer's handbook of integrated circuits
editor, Arthur B. Williams
McGraw-Hill, 1984
 Buku Referensi
Pilyar, Yuri
It all really happened
Foreign Languages Publishing House, [date of publication not identified]
 Buku Teks SO