APA (7th ed.) Citation

Kern, W. F. (1940). Plane and spherical trigonometry (2nd ed.). McGraw-Hill Book.

Chicago Style (17th ed.) Citation

Kern, Willis F. Plane and Spherical Trigonometry. 2nd ed. New York: McGraw-Hill Book, 1940.

MLA (9th ed.) Citation

Kern, Willis F. Plane and Spherical Trigonometry. 2nd ed. McGraw-Hill Book, 1940.