National Municipal League. (1952). A guide for charter commissions (2nd rev. ed.). National Municipal League.
Chicago-viite (17. p.)National Municipal League. A Guide for Charter Commissions. 2nd rev. ed. New York: National Municipal League, 1952.
MLA-viite (9. p.)National Municipal League. A Guide for Charter Commissions. 2nd rev. ed. National Municipal League, 1952.
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