Von Eckardt, W., & Gottmann, J. M. (1964). The challenge of Megalopolis, a graphic presentation of the urbanized Northeastern Seaboard of the United States. MacMillan.
Lua i Stíl Chicago (17ú heag.)Von Eckardt, Wolf, agus Jean. Megapolis Gottmann. The Challenge of Megalopolis, a Graphic Presentation of the Urbanized Northeastern Seaboard of the United States. New Yorkn: MacMillan, 1964.
Lua MLA (9ú heag.)Von Eckardt, Wolf, agus Jean. Megapolis Gottmann. The Challenge of Megalopolis, a Graphic Presentation of the Urbanized Northeastern Seaboard of the United States. MacMillan, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.