APA (7th ed.) Citation

Johnston, C. L. (1970). Plane trigonometry, a new approach. Prentice-Hall.

Chicago Style (17th ed.) Citation

Johnston, C. L. Plane Trigonometry, a New Approach. Englewood Cliffs, N. J.: Prentice-Hall, 1970.

MLA (9th ed.) Citation

Johnston, C. L. Plane Trigonometry, a New Approach. Prentice-Hall, 1970.