Cita APA

Kells, L. M. n. 1., & Kells, L. M. n. 1. (1940). Plane and spherical trigonotry (2. edition --.). New York, New York: McGraw-Hill.

Citación estilo Chicago

Kells, Lyman Morse n. 1888, y Lyman Morse n. 1888 Kells. Plane and Spherical Trigonotry. 2. edition --. New York, New York: McGraw-Hill, 1940.

Cita MLA

Kells, Lyman Morse n. 1888, y Lyman Morse n. 1888 Kells. Plane and Spherical Trigonotry. 2. edition --. New York, New York: McGraw-Hill, 1940.