Tobey, J., Slater, J., Blair, J., & Crawford, J. (2009). Basic college mathematics (6th ed.). Pearson.
Chicago-viite (17. p.)Tobey, John, Jeffrey Slater, Jamie Blair, ja Jennifer Crawford. Basic College Mathematics. 6th ed. Upper Saddle River, N.J: Pearson, 2009.
MLA-viite (9. p.)Tobey, John, et al. Basic College Mathematics. 6th ed. Pearson, 2009.
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