National Municipal League. (1952). A guide for charter commissions (2nd rev. ed.). National Municipal League.
Lua i Stíl Chicago (17ú heag.)National Municipal League. A Guide for Charter Commissions. 2nd rev. ed. New York: National Municipal League, 1952.
Lua MLA (9ú heag.)National Municipal League. A Guide for Charter Commissions. 2nd rev. ed. National Municipal League, 1952.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.