Cita APA (7th ed.)

Demana, F. D., & Waits, B. K. (1990). Trigonometry, a graphing approach. Addison-Wesley Pub. Co.

Cita Chicago (17th ed.)

Demana, Franklin D., i Bert K. Waits. Trigonometry, a Graphing Approach. Reading, Mass: Addison-Wesley Pub. Co, 1990.

Cita MLA (9th ed.)

Demana, Franklin D., i Bert K. Waits. Trigonometry, a Graphing Approach. Addison-Wesley Pub. Co, 1990.