(1994). Map adventures / U.S. Department of the Interior, U.S. Geological Survey.
Čikaški stil citiranja (17. izdanje)Map Adventures / U.S. Department of the Interior, U.S. Geological Survey. 1994.
MLA način citiranja (9. izdanje)Map Adventures / U.S. Department of the Interior, U.S. Geological Survey. 1994.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.