APA (7th ed.) Citation

Grout, E. (1990). Easy access to WordPerfect: Release 4.2 incorporating versions 4.1 and 5.0. Pitman.

Chicago Style (17th ed.) Citation

Grout, Eileen. Easy Access to WordPerfect: Release 4.2 Incorporating Versions 4.1 and 5.0. London: Pitman, 1990.

MLA (8th ed.) Citation

Grout, Eileen. Easy Access to WordPerfect: Release 4.2 Incorporating Versions 4.1 and 5.0. Pitman, 1990.

Warning: These citations may not always be 100% accurate.