APA (7th ed.) Citation

Johnston, C. L. (1970). Plane trigonometry: A new approach. Appleton-Century-Crofts.

Chicago Style (17th ed.) Citation

Johnston, Carol Lee. Plane Trigonometry: A New Approach. New York: Appleton-Century-Crofts, 1970.

MLA (9th ed.) Citation

Johnston, Carol Lee. Plane Trigonometry: A New Approach. Appleton-Century-Crofts, 1970.