APA (7th ed.) Citation

HECKENBACH, A. J. Elementary Functions: An approach to precalculus mathematics. The Macmillan Company.

Chicago Style (17th ed.) Citation

HECKENBACH, Alan J. Elementary Functions: An Approach to Precalculus Mathematics. The Macmillan Company.

MLA (8th ed.) Citation

HECKENBACH, Alan J. Elementary Functions: An Approach to Precalculus Mathematics. The Macmillan Company.

Warning: These citations may not always be 100% accurate.