Leven, C. L. (1977). Growth and non-growth in metropolitan areas the emergence of Polycentric Metropolitan form. Institute for Urban and Regional Studies, Washington university.
Lua i Stíl Chicago (17ú heag.)Leven, Charles L. Growth and Non-growth in Metropolitan Areas the Emergence of Polycentric Metropolitan Form. [St. Louis, Mo: Institute for Urban and Regional Studies, Washington university, 1977.
Lua MLA (9ú heag.)Leven, Charles L. Growth and Non-growth in Metropolitan Areas the Emergence of Polycentric Metropolitan Form. Institute for Urban and Regional Studies, Washington university, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.