Duggal, S. M. (1992). Business programming using dBase IV: A structured approach to systems development. Macmillan ; Maxwell Macmillan Canada ; Maxwell Macmillan International.
芝加哥风格引文Duggal, Sudesh M. Business Programming Using DBase IV: A Structured Approach to Systems Development. New York : Toronto : New York: Macmillan ; Maxwell Macmillan Canada ; Maxwell Macmillan International, 1992.
MLA引文Duggal, Sudesh M. Business Programming Using DBase IV: A Structured Approach to Systems Development. Macmillan ; Maxwell Macmillan Canada ; Maxwell Macmillan International, 1992.
警告：这些引文格式不一定是100％准确.