Demana, F. D., Waits, B. K., & Clemens, S. R. (1993). Precalculus: Functions and graphs. Addison-Wesley.
Lua i Stíl Chicago (17ú heag.)Demana, Franklin D., Bert K. Waits, agus Stanley R. Clemens. Precalculus: Functions and Graphs. Reading, MA: Addison-Wesley, 1993.
Lua MLA (9ú heag.)Demana, Franklin D., et al. Precalculus: Functions and Graphs. Addison-Wesley, 1993.
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