Ginsburg, N. S., & Berry, B. J. (1960). Essays on geography and economic development. University of Chicago.
Lua i Stíl Chicago (17ú heag.)Ginsburg, Norton Sydney, agus Brian J.L Berry. Essays on Geography and Economic Development. Chicago: University of Chicago, 1960.
Lua MLA (9ú heag.)Ginsburg, Norton Sydney, agus Brian J.L Berry. Essays on Geography and Economic Development. University of Chicago, 1960.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.