SIMPSON ALAN. (1986). UNDERSTANDING DBASE 111 PLUS. BPB PUBLICATIONS.
Chicago Style (17th ed.) CitationSIMPSON ALAN. UNDERSTANDING DBASE 111 PLUS. DELHI: BPB PUBLICATIONS, 1986.
MLA引文SIMPSON ALAN. UNDERSTANDING DBASE 111 PLUS. BPB PUBLICATIONS, 1986.
警告:這些引文格式不一定是100%准確.