Gaya APA

Corporation, A. (1988). DBASE IV; Learning dBase IV Advanced Topics (Setting The New Data Management Standard) . California: ASHTON-TATE CORPORATION.

Gaya MLA

Corporation, Ashton-Tate. "DBASE IV; Learning dBase IV Advanced Topics (Setting The New Data Management Standard)". California: ASHTON-TATE CORPORATION, 1988. Text.