एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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