APA (7th ed.) Citation

Weber Systems. (1984). Lotus 1-2-3 user's handbook. Wber Systems.

Chicago Style (17th ed.) Citation

Weber Systems. Lotus 1-2-3 User's Handbook. Cleveland, Ohio: Wber Systems, 1984.

MLA (9th ed.) Citation

Weber Systems. Lotus 1-2-3 User's Handbook. Wber Systems, 1984.