Butler, E. (1940). Great Britain, European countries, World geography. Educational co. of Ireland.
Citazione stile Chigago Style (17a edizione)Butler, Elenor. Great Britain, European Countries, World Geography. Dublin: Educational co. of Ireland, 1940.
Citatione MLA (9a ed.)Butler, Elenor. Great Britain, European Countries, World Geography. Educational co. of Ireland, 1940.
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