Cita APA (7a ed.)
Drooyan, I., Hadel, W., & Carico, C. C. (1987). Trigonometry: An analytic approach (5.vyd.). Macmillan Publishing Company.
Cita Chicago Style (17a ed.)
Drooyan, Irving, Walter Hadel, y Charles C. Carico. Trigonometry: An Analytic Approach. 5.vyd. New York: Macmillan Publishing Company, 1987.
Cita MLA (9a ed.)
Drooyan, Irving, et al. Trigonometry: An Analytic Approach. 5.vyd. Macmillan Publishing Company, 1987.
Precaución: Estas citas no son 100% exactas.