Travers, K. J., & Dalton, L. C. (1987). Algebra 1. Laidlaw brothers.
Lua i Stíl Chicago (17ú heag.)Travers, Kenneth J., agus LeRoy C. Dalton. Algebra 1. Sacramento: Laidlaw brothers, 1987.
Lua MLA (9ú heag.)Travers, Kenneth J., agus LeRoy C. Dalton. Algebra 1. Laidlaw brothers, 1987.
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