APA (7th ed.) Citation

Niles, N. O. (1968). Plane trigonometry (2. ed.). Wiley.

Chicago Style (17th ed.) Citation

Niles, Nathan O. Plane Trigonometry. 2. ed. New York u.a: Wiley, 1968.

MLA (9th ed.) Citation

Niles, Nathan O. Plane Trigonometry. 2. ed. Wiley, 1968.