APA (7th ed.) Citation

Ibáñez, Á. (1991). WordPerfect 5.1 (4. ed.). Paraninfo.

Chicago Style (17th ed.) Citation

Ibáñez, Álvaro. WordPerfect 5.1. 4. ed. Madrid: Paraninfo, 1991.

MLA (9th ed.) Citation

Ibáñez, Álvaro. WordPerfect 5.1. 4. ed. Paraninfo, 1991.

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