APA

Garrison C., . (1990). dBase IV. New York: Addison-Wesley Publishing Company.

Chicago

Garrison C, . 1990. dBase IV. New York: Addison-Wesley Publishing Company.

Harvard

Garrison C., . (1990). dBase IV. New York: Addison-Wesley Publishing Company.

MLA

Garrison C, . dBase IV. New York: Addison-Wesley Publishing Company. 1990.