Steffensen, A. R., & Johnson, L. M. (1991). Intermediate algebra (4th ed.). HarperCollins.
Chicago Style (17th ed.) CitationSteffensen, Arnold R., and L. Murphy Johnson. Intermediate Algebra. 4th ed. New York: HarperCollins, 1991.
ציטוט MLASteffensen, Arnold R., and L. Murphy Johnson. Intermediate Algebra. 4th ed. HarperCollins, 1991.
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