Pittsburgh Exposition Society. (1880). Third annual report of the Board of Managers of the Pittsburgh Exposition Society, Pittsburgh, January 6, 1880. Printed by Nevin Bros..
Lua i Stíl Chicago (17ú heag.)Pittsburgh Exposition Society. Third Annual Report of the Board of Managers of the Pittsburgh Exposition Society, Pittsburgh, January 6, 1880. Pittsburgh: Printed by Nevin Bros., 1880.
Lua MLA (8ú heag.)Pittsburgh Exposition Society. Third Annual Report of the Board of Managers of the Pittsburgh Exposition Society, Pittsburgh, January 6, 1880. Printed by Nevin Bros., 1880.
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