Cita APA (7a ed.)

Hurn, J. (1989). GPS: A guide to the Next utility. Trimble Navigation.

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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