Semarang, P. A. Y. d. W. K. (1989). Panduan Paket Program WS Professional release 5+Wordperfect ver. 5.0 Dilengkapi Lettix PC Tools Deluxe Sidekick. Jakarta: PT Elex Media Komputindo, 1989.
Chicago Style (17th ed.) CitationSemarang, Penerbit Andi Yogyakarta dan Wahana Komputer. Panduan Paket Program WS Professional Release 5+Wordperfect Ver. 5.0 Dilengkapi Lettix PC Tools Deluxe Sidekick. Jakarta: PT Elex Media Komputindo, 1989, 1989.
MLA (8th ed.) CitationSemarang, Penerbit Andi Yogyakarta dan Wahana Komputer. Panduan Paket Program WS Professional Release 5+Wordperfect Ver. 5.0 Dilengkapi Lettix PC Tools Deluxe Sidekick. Jakarta: PT Elex Media Komputindo, 1989, 1989.
Warning: These citations may not always be 100% accurate.