Chapin, H. M. (1932). American municipal Arms: By Howard M. Chapin. The American Hist. Soc..
Lua i Stíl Chicago (17ú heag.)Chapin, Howard M. American Municipal Arms: By Howard M. Chapin. New York: The American Hist. Soc., 1932.
Lua MLA (8ú heag.)Chapin, Howard M. American Municipal Arms: By Howard M. Chapin. The American Hist. Soc., 1932.
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