Greg Harvey. (1990). Wordperfect 5.1 instant reference. Singapore: Tech Publications.
शिकागो स्टाइल उद्धरणGreg Harvey. Wordperfect 5.1 Instant Reference. Singapore: Tech Publications, 1990.
एमएलए उद्धरणGreg Harvey. Wordperfect 5.1 Instant Reference. Singapore: Tech Publications, 1990.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.