APA (7th ed.) Citation

Drooyan, I., & Hadel, W. (1967). Trigonometry: An analytic approach. Macmillan.

Chicago Style (17th ed.) Citation

Drooyan, Irving, and Walter Hadel. Trigonometry: An Analytic Approach. New York: Macmillan, 1967.

MLA (8th ed.) Citation

Drooyan, Irving, and Walter Hadel. Trigonometry: An Analytic Approach. Macmillan, 1967.

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