APA (7th ed.) Citation

Davis, W. S. (1990). Productivity tools: PC-DOS & MS-DOS, WordPerfect 5.0/5.1, Lotus 1-2-3, release 2.01/2.2, dBase III PLUS. Addison-Wesley.

Chicago Style (17th ed.) Citation

Davis, William S. Productivity Tools: PC-DOS & MS-DOS, WordPerfect 5.0/5.1, Lotus 1-2-3, Release 2.01/2.2, DBase III PLUS. Reading, Mass: Addison-Wesley, 1990.

MLA (9th ed.) Citation

Davis, William S. Productivity Tools: PC-DOS & MS-DOS, WordPerfect 5.0/5.1, Lotus 1-2-3, Release 2.01/2.2, DBase III PLUS. Addison-Wesley, 1990.