Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

Ayres, Frank. Schaum's Outline of Theory and Problems of Plane and Spherical Trigonometry. Nueva York: Schaum, 1954.

Citatione MLA (9a ed.)

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