Cita APA (7th ed.)

Simpson, A. (1993). Mastering WordPerfect 6. Sybex.

Cita Chicago (17th ed.)

Simpson, Alan. Mastering WordPerfect 6. San Francisco: Sybex, 1993.

Cita MLA (9th ed.)

Simpson, Alan. Mastering WordPerfect 6. Sybex, 1993.