WHEELER, J. O., & MULLER, P. O. (1981). Economy geography. John Wiley and Sons.
Lua i Stíl Chicago (17ú heag.)WHEELER, James O., agus Peter O. MULLER. Economy Geography. New York: John Wiley and Sons, 1981.
Lua MLA (9ú heag.)WHEELER, James O., agus Peter O. MULLER. Economy Geography. John Wiley and Sons, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.