Townsend, C. (1992). Mastering dBase IV programming. Sybex, Illinois.
芝加哥风格引文Townsend, Carl. Mastering DBase IV Programming. San Francisco : Glencoe: Sybex, Illinois, 1992.
MLA引文Townsend, Carl. Mastering DBase IV Programming. Sybex, Illinois, 1992.
警告：这些引文格式不一定是100％准确.