Precalculus mathematics :
a functions approach /
Floyd F. Helton, Margaret L. Lial.
APA Citation
Helton, F. Franklin., Lial, M. L. (1983). Precalculus mathematics: a functions approach. Glenview, Ill.: Scott, Foresman.
MLA Citation
Helton, Floyd Franklin, 1912-, and Margaret L Lial. Precalculus Mathematics: a Functions Approach. Glenview, Ill.: Scott, Foresman, 1983.
Warning: These citations may not always be complete (especially for serials).