Phillpis, E. R. (1987). Studies in the history of mathematics. The Mathematical Association of America.
Lua i Stíl Chicago (17ú heag.)Phillpis, Esther R. Studies in the History of Mathematics. Washington, D.C: The Mathematical Association of America, 1987.
Lua MLA (9ú heag.)Phillpis, Esther R. Studies in the History of Mathematics. The Mathematical Association of America, 1987.
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