Cita APA (7a ed.)
Hirsch, C. R., & Schoen, H. L. (1985). Trigonometry and its applications. McGraw-Hill.
Cita Chicago Style (17a ed.)
Hirsch, Christian R., y Harold L. Schoen. Trigonometry and Its Applications. New York: McGraw-Hill, 1985.
Cita MLA (9a ed.)
Hirsch, Christian R., y Harold L. Schoen. Trigonometry and Its Applications. McGraw-Hill, 1985.
Precaución: Estas citas no son 100% exactas.