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..
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)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.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)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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