Cita APA (7th ed.)

Stultz, R. A. (1990). Learn dBase Programming in a Day. Wordware Publishing.

Cita Chicago (17th ed.)

Stultz, Russell A. Learn DBase Programming in a Day. Plano, TX: Wordware Publishing, 1990.

Cita MLA (9th ed.)

Stultz, Russell A. Learn DBase Programming in a Day. Wordware Publishing, 1990.