APA (7th ed.) Citation

Kells, L. M., Kern, W. F., & Bland, J. R. (1940). Plane and spherical trigonometry (2nd edition.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Kells, Lyman Morse, Willis F. Kern, and James R. Bland. Plane and Spherical Trigonometry. 2nd edition. New York: McGraw-Hill, 1940.

MLA (9th ed.) Citation

Kells, Lyman Morse, et al. Plane and Spherical Trigonometry. 2nd edition. McGraw-Hill, 1940.