APA Edition Citation

Simpson, A. . . .. (1989). Understanding dBase IV 2.0 for DOS (4.). Tech.

Chicago Edition Citation

Simpson, Alan. Understanding DBase IV 2.0 for DOS. 4. Singapore: Tech, 1989.

MLA Edition Citation

Simpson, Alan. Understanding DBase IV 2.0 for DOS. 4. Tech, 1989.

Warning: These citations may not always be 100% accurate.