WHEELER, R. E. (1988). Modern mathematics.-- Ed.7. Brooks/Cole Pub.
Lua i Stíl Chicago (17ú heag.)WHEELER, Ruric E. Modern Mathematics.-- Ed.7. Pacific Grove: Brooks/Cole Pub, 1988.
Lua MLA (9ú heag.)WHEELER, Ruric E. Modern Mathematics.-- Ed.7. Brooks/Cole Pub, 1988.
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