Cita APA (7th ed.)

Hecenbach, A. J., & Kegley, J. C. (1970). Elementary functions: An approach to precalculus mathematics. Macmillan.

Cita Chicago (17th ed.)

Hecenbach, Alan J., i J. Colby Kegley. Elementary Functions: An Approach to Precalculus Mathematics. Nueva York: Macmillan, 1970.

Cita MLA (9th ed.)

Hecenbach, Alan J., i J. Colby Kegley. Elementary Functions: An Approach to Precalculus Mathematics. Macmillan, 1970.