Kirkpatrick, K. S., & Safier, F. S. o. o. t. a. p. o. p. (2002). Precalculus: Based on Schaum's Outline of precalculus by Fred Safier. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Kirkpatrick, Kimberly S., agus Fred. Schaum?s outline of theory and problems of precalculus Safier. Precalculus: Based on Schaum's Outline of Precalculus by Fred Safier. New York: McGraw-Hill, 2002.
Lua MLA (9ú heag.)Kirkpatrick, Kimberly S., agus Fred. Schaum?s outline of theory and problems of precalculus Safier. Precalculus: Based on Schaum's Outline of Precalculus by Fred Safier. McGraw-Hill, 2002.
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