Coolidge, J. L. (1949). The Mathematics of great amateurs. Clarendon Press.
Lua i Stíl Chicago (17ú heag.)Coolidge, Julian Lowell. The Mathematics of Great Amateurs. Oxford: Clarendon Press, 1949.
Lua MLA (9ú heag.)Coolidge, Julian Lowell. The Mathematics of Great Amateurs. Clarendon Press, 1949.
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