Cita APA (7th ed.)

Hursch, J. L., & Hursch, C. J. (1989). dBASE IV SQL user's guide. Ashton-Tate.

Cita Chicago (17th ed.)

Hursch, Jack L., i Carolyn J. Hursch. DBASE IV SQL User's Guide. Torrance, Calif: Ashton-Tate, 1989.

Cita MLA (9th ed.)

Hursch, Jack L., i Carolyn J. Hursch. DBASE IV SQL User's Guide. Ashton-Tate, 1989.