Παραπομπή APA

Ayers, F. (1954). Theory and problems of plane and spherical trignometry. McGraw-Hill.

Παραπομπή Chicago Style

Ayers, Frank. Theory and Problems of Plane and Spherical Trignometry. New york: McGraw-Hill, 1954.

Παραπομπή MLA

Ayers, Frank. Theory and Problems of Plane and Spherical Trignometry. McGraw-Hill, 1954.