WALLA, S. (1996). Panduan Bagi Orang Sibuk: WordPerfect 6.1 for Windows. Elex Media Komputindo.
Chicago Style (17th ed.) CitationWALLA, Sonny. Panduan Bagi Orang Sibuk: WordPerfect 6.1 for Windows. Elex Media Komputindo, 1996.
MLA (8th ed.) CitationWALLA, Sonny. Panduan Bagi Orang Sibuk: WordPerfect 6.1 for Windows. Elex Media Komputindo, 1996.
Warning: These citations may not always be 100% accurate.