Cita APA (7th ed.)

Horner, D. R. (1968). Trigonometry: A study of certain real functions. Holt, Rinehart and Winston.

Cita Chicago (17th ed.)

Horner, Donald R. Trigonometry: A Study of Certain Real Functions. New York: Holt, Rinehart and Winston, 1968.

Cita MLA (9th ed.)

Horner, Donald R. Trigonometry: A Study of Certain Real Functions. Holt, Rinehart and Winston, 1968.