APA (7th ed.) Citation

Harding, A. M. (1937). Plane trigonometry (Revised ed.). Macmillan.

Chicago Style (17th ed.) Citation

Harding, Arthur M. Plane Trigonometry. Revised ed. New York: Macmillan, 1937.

MLA (9th ed.) Citation

Harding, Arthur M. Plane Trigonometry. Revised ed. Macmillan, 1937.