Παραπομπή APA

Ayres, F. J. (1954). Schaum's outline of theory and problems of plane and spherical trigonometry. McGraw Hill.

Παραπομπή Chicago Style

Ayres, Frank Junior. Schaum's Outline of Theory and Problems of Plane and Spherical Trigonometry. New York: McGraw Hill, 1954.

Παραπομπή MLA

Ayres, Frank Junior. Schaum's Outline of Theory and Problems of Plane and Spherical Trigonometry. McGraw Hill, 1954.