APA (7th ed.) Citation

Lans, R. F. v. d. (1991). An SQL guide for dBASE IV. Addison-Wesley.

Chicago Style (17th ed.) Citation

Lans, Rick F. van der. An SQL Guide for DBASE IV. Wokingham [etc.]: Addison-Wesley, 1991.

MLA (9th ed.) Citation

Lans, Rick F. van der. An SQL Guide for DBASE IV. Addison-Wesley, 1991.