Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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