Spence, J. W., & Windsor, J. C. (1987). Microcomputers in business: WordStar, dBase II and III, and Lotus 1-2-3. Times Mirror/Mosby College Pub.
Lua i Stíl Chicago (17ú heag.)Spence, J. Wayne, agus John C. Windsor. Microcomputers in Business: WordStar, DBase II and III, and Lotus 1-2-3. St. Louis: Times Mirror/Mosby College Pub, 1987.
Lua MLA (9ú heag.)Spence, J. Wayne, agus John C. Windsor. Microcomputers in Business: WordStar, DBase II and III, and Lotus 1-2-3. Times Mirror/Mosby College Pub, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.