Cita APA (7a ed.)

Hurn, J. (1989). GPS: A guide to the next utility (1st edition.). Trimble Navigation.

Cita Chicago Style (17a ed.)

Hurn, Jeff. GPS: A Guide to the Next Utility. 1st edition. Sunnyvale, California: Trimble Navigation, 1989.

Cita MLA (8a ed.)

Hurn, Jeff. GPS: A Guide to the Next Utility. 1st edition. Trimble Navigation, 1989.