APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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