APA (7th ed.) Citation

Simpson, A.. (1992). Understanding dBase IV 1.5 for DOS (3rd ed.). Tech Publications.

Chicago Style (17th ed.) Citation

Simpson, Alan. Understanding DBase IV 1.5 for DOS. 3rd ed. Singapore: Tech Publications, 1992.

MLA (9th ed.) Citation

Simpson, Alan. Understanding DBase IV 1.5 for DOS. 3rd ed. Tech Publications, 1992.

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