Sullivan, M. (2003). Precalculus: Enhanced with graphing utilities (3a. ed.). Prentice Hall.
Chicago-viite (17. p.)Sullivan, Michael. Precalculus: Enhanced with Graphing Utilities. 3a. ed. Upper Saddle River: Prentice Hall, 2003.
MLA-viite (9. p.)Sullivan, Michael. Precalculus: Enhanced with Graphing Utilities. 3a. ed. Prentice Hall, 2003.
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