APA način citiranja (7. izdanje)
Fisher, R. (1991). Heartland of a continent: America's plains and prairies. National Geographic Society.
Čikaški stil citiranja (17. izdanje)
Fisher, Ron. Heartland of a Continent: America's Plains and Prairies. Washington, D.C.: National Geographic Society, 1991.
MLA način citiranja (9. izdanje)
Fisher, Ron. Heartland of a Continent: America's Plains and Prairies. National Geographic Society, 1991.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.