APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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