APA (7th ed.) Citation

Smith, K. J. (1998). Essentials of trigonometry (3rd ed.). Brooks/Cole.

Chicago Style (17th ed.) Citation

Smith, Karl J. Essentials of Trigonometry. 3rd ed. Pacific Grove, Calif.: Brooks/Cole, 1998.

MLA (9th ed.) Citation

Smith, Karl J. Essentials of Trigonometry. 3rd ed. Brooks/Cole, 1998.