Marcus, M. (1970). Algebra and trigonometry. Houghton Mifflin Company.
Lua i Stíl Chicago (17ú heag.)Marcus, Marvin. Algebra and Trigonometry. Boston: Houghton Mifflin Company, 1970.
Lua MLA (9ú heag.)Marcus, Marvin. Algebra and Trigonometry. Houghton Mifflin Company, 1970.
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