WordPerfect Referencia. WordPerfect Corporation, cop. 1990.
Cita Chicago (17th ed.)WordPerfect Referencia. Orem (Utah): WordPerfect Corporation, cop. 1990.
Cita MLA (9th ed.)WordPerfect Referencia. WordPerfect Corporation, cop. 1990.
Atenció: Aquestes cites poden no estar 100% correctes.