Cita APA (7a ed.)

SIMPSON ALAN. (1989). UNDERSTANDING DBASE IV. BPB PUBLICATIONS.

Cita Chicago Style (17a ed.)

SIMPSON ALAN. UNDERSTANDING DBASE IV. DELHI: BPB PUBLICATIONS, 1989.

Cita MLA (9a ed.)

SIMPSON ALAN. UNDERSTANDING DBASE IV. BPB PUBLICATIONS, 1989.