Cita APA (7th ed.)

(1988). WordPerfect for IBM personal computers, version 5.0. Perfect Bound Pub. & Trading.

Cita Chicago (17th ed.)

WordPerfect for IBM Personal Computers, Version 5.0. Quezon City: Perfect Bound Pub. & Trading, 1988.

Cita MLA (9th ed.)

WordPerfect for IBM Personal Computers, Version 5.0. Perfect Bound Pub. & Trading, 1988.