Sprague, F. J. (1883). Report on the exhibits at the Crystal Palace Electrical Exhibition, 1882. G.P.O..
Lua i Stíl Chicago (17ú heag.)Sprague, Frank J. Report on the Exhibits at the Crystal Palace Electrical Exhibition, 1882. Washington [D.C.]: G.P.O., 1883.
Lua MLA (8ú heag.)Sprague, Frank J. Report on the Exhibits at the Crystal Palace Electrical Exhibition, 1882. G.P.O., 1883.
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