Dyfyniad APA

Penna, J. A. (2006). Graphing calculator manual: Algebra and Trigonometry: Graphs and Models. Boston: Pearson.

Dyfyniad Arddull Chicago

Penna, Judith A. Graphing Calculator Manual: Algebra and Trigonometry: Graphs and Models. Boston: Pearson, 2006.

Dyfyniad MLA

Penna, Judith A. Graphing Calculator Manual: Algebra and Trigonometry: Graphs and Models. Boston: Pearson, 2006.

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