Smith, K. J. (1987). Trigonometry for college students (4th ed.). Brooks/Cole Pub. Co..
Čikaški stil citiranja (17. izdanje)Smith, Karl J. Trigonometry for College Students. 4th ed. Monterey, Calif.: Brooks/Cole Pub. Co., 1987.
MLA način citiranja (9. izdanje)Smith, Karl J. Trigonometry for College Students. 4th ed. Brooks/Cole Pub. Co., 1987.
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