APA

Edward Jones, .dBase III Plus. Madrid, España : McGraw-Hill, 1990: .

Chicago

Edward Jones, .dBase III Plus. Madrid, España : McGraw-Hill, 1990: .

Harvard

Edward Jones, .dBase III Plus. Madrid, España : McGraw-Hill, 1990: .

MLA

Edward Jones, .Madrid, España : McGraw-Hill, 1990: . .