APA (7th ed.) Citation

Perlin, I. E. (1955). Trigonometry. International Textbook Co..

Chicago Style (17th ed.) Citation

Perlin, Irwin Earl. Trigonometry. Scranton, Pa.: International Textbook Co., 1955.

MLA (9th ed.) Citation

Perlin, Irwin Earl. Trigonometry. International Textbook Co., 1955.