Ayres, F., & Moyer, R. E. (1990). Schaum's outline of theory and problems of trigonometry (2nd ed.). New York: McGraw-Hill.
Παραπομπή Chicago StyleAyres, Frank, and Robert E. Moyer. Schaum's Outline of Theory and Problems of Trigonometry. 2nd ed. New York: McGraw-Hill, 1990.
Παραπομπή MLAAyres, Frank, and Robert E. Moyer. Schaum's Outline of Theory and Problems of Trigonometry. 2nd ed. New York: McGraw-Hill, 1990.
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