O'SULLIVIAN, P. (1981). Geographical economics. John Wiley and Sons.
Čikaški stil citiranja (17. izdanje)O'SULLIVIAN, Patrick. Geographical Economics. New York: John Wiley and Sons, 1981.
MLA način citiranja (9. izdanje)O'SULLIVIAN, Patrick. Geographical Economics. John Wiley and Sons, 1981.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.