Cita APA

Kells, L. M. n. 1., Bland, J. R., & Kern, W. F. (1951). Plane and spherical trigonometry (3. edition.). New York, New York: McGraw-Hill.

Citación estilo Chicago

Kells, Lyman Morse n. 1888, James R. Bland, y Willis F. Kern. Plane and Spherical Trigonometry. 3. edition. New York, New York: McGraw-Hill, 1951.

Cita MLA

Kells, Lyman Morse n. 1888, James R. Bland, y Willis F. Kern. Plane and Spherical Trigonometry. 3. edition. New York, New York: McGraw-Hill, 1951.