Ford, R. E. (1999). GeoSystems today: An interactive casebook. New York: John Wiley & Sons.
Čikaški stil citiranjaFord, Robert E. GeoSystems Today: An Interactive Casebook. New York: John Wiley & Sons, 1999.
MLA način citiranjaFord, Robert E. GeoSystems Today: An Interactive Casebook. New York: John Wiley & Sons, 1999.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.