Butterfield, W. H. (1914). Making fences, walls and hedges. McBride, Nast & company.
Lua i Stíl Chicago (17ú heag.)Butterfield, William Harold. Making Fences, Walls and Hedges. New York: McBride, Nast & company, 1914.
Lua MLA (8ú heag.)Butterfield, William Harold. Making Fences, Walls and Hedges. McBride, Nast & company, 1914.
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