Cita APA (7a ed.)

SIMPSON ALAN. (1991). DBASE IV 1.1 PROGRAMMER`S DESKTOP REFERENCE. TECH PUBLICATIONS.

Cita Chicago Style (17a ed.)

SIMPSON ALAN. DBASE IV 1.1 PROGRAMMER`S DESKTOP REFERENCE. SINGAPORE: TECH PUBLICATIONS, 1991.

Cita MLA (9a ed.)

SIMPSON ALAN. DBASE IV 1.1 PROGRAMMER`S DESKTOP REFERENCE. TECH PUBLICATIONS, 1991.