HECKENBACH, A. J. Elementary Functions: An approach to precalculus mathematics. The Macmillan Company.
Chicago Style (17th ed.) CitationHECKENBACH, Alan J. Elementary Functions: An Approach to Precalculus Mathematics. The Macmillan Company.
MLA (8th ed.) CitationHECKENBACH, Alan J. Elementary Functions: An Approach to Precalculus Mathematics. The Macmillan Company.
Warning: These citations may not always be 100% accurate.