Abrhamson, M. (1976). Urban sociology. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Abrhamson, Mark. Urban Sociology. Englewood Cliffs, N. J: Prentice-Hall, 1976.
Lua MLA (9ú heag.)Abrhamson, Mark. Urban Sociology. Prentice-Hall, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.