Engel, A. (1993). Exploring mathematics with your computer. The Mathematical Association of America.
Lua i Stíl Chicago (17ú heag.)Engel, Arthur. Exploring Mathematics with Your Computer. Washington, D.C: The Mathematical Association of America, 1993.
Lua MLA (9ú heag.)Engel, Arthur. Exploring Mathematics with Your Computer. The Mathematical Association of America, 1993.
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