APA (7th ed.) Citation

Hart, W. L. R. (1961). Modern plane trigonometry. Heath.

Chicago Style (17th ed.) Citation

Hart, William Le Roy. Modern Plane Trigonometry. Boston, Mass: Heath, 1961.

MLA (9th ed.) Citation

Hart, William Le Roy. Modern Plane Trigonometry. Heath, 1961.

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