Cita APA

Hurn, J., & Hurn, J. (1989). GPS: A guide to the next utility. Sunnyvale Calif.: Trimble Navigation.

Citación estilo Chicago

Hurn, Jeff, y Jeff Hurn. GPS: A Guide to the Next Utility. Sunnyvale Calif.: Trimble Navigation, 1989.

Cita MLA

Hurn, Jeff, y Jeff Hurn. GPS: A Guide to the Next Utility. Sunnyvale Calif.: Trimble Navigation, 1989.