SIMPSON ALAN. (1991). DBASE IV 1.1 PROGRAMMER`S DESKTOP REFERENCE. TECH PUBLICATIONS.
芝加哥风格引文SIMPSON ALAN. DBASE IV 1.1 PROGRAMMER`S DESKTOP REFERENCE. SINGAPORE: TECH PUBLICATIONS, 1991.
MLA引文SIMPSON ALAN. DBASE IV 1.1 PROGRAMMER`S DESKTOP REFERENCE. TECH PUBLICATIONS, 1991.
警告：这些引文格式不一定是100％准确.