O'SULLIVIAN, P. (1981). Geographical economics. John Wiley and Sons.
Lua i Stíl Chicago (17ú heag.)O'SULLIVIAN, Patrick. Geographical Economics. New York: John Wiley and Sons, 1981.
Lua MLA (9ú heag.)O'SULLIVIAN, Patrick. Geographical Economics. John Wiley and Sons, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.