SIMPSON ALAN. (1991). DBASE IV 1.1 PROGRAMMER`S DESKTOP REFERENCE. TECH PUBLICATIONS.
Čikaški stil citiranja (17. izdanje)SIMPSON ALAN. DBASE IV 1.1 PROGRAMMER`S DESKTOP REFERENCE. SINGAPORE: TECH PUBLICATIONS, 1991.
MLA način citiranja (9. izdanje)SIMPSON ALAN. DBASE IV 1.1 PROGRAMMER`S DESKTOP REFERENCE. TECH PUBLICATIONS, 1991.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.