APA (7th ed.) Citation

Washington, A. J. (1977). Plane trigonometry. Cummings Publishing.

Chicago Style (17th ed.) Citation

Washington, Allyn J. Plane Trigonometry. Menlo Park, Calif: Cummings Publishing, 1977.

MLA (9th ed.) Citation

Washington, Allyn J. Plane Trigonometry. Cummings Publishing, 1977.

Warning: These citations may not always be 100% accurate.