Smith, G. J. (1917). Longmans' English lessons. Longmans, Green and Co..
Lua i Stíl Chicago (17ú heag.)Smith, George James. Longmans' English Lessons. New York ; Chicago: Longmans, Green and Co., 1917.
Lua MLA (8ú heag.)Smith, George James. Longmans' English Lessons. Longmans, Green and Co., 1917.
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