Swokowski, E. W. (1986). Fundamentals of algebra and trigonometry (6th ed.). Prindle, Weber & Schmidt.
Lua i Stíl Chicago (17ú heag.)Swokowski, Earl W. Fundamentals of Algebra and Trigonometry. 6th ed. Boston: Prindle, Weber & Schmidt, 1986.
Lua MLA (9ú heag.)Swokowski, Earl W. Fundamentals of Algebra and Trigonometry. 6th ed. Prindle, Weber & Schmidt, 1986.
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