APA (7th ed.) Citation

Crockett, C. W. (1903). Elements of plane trigonometry. American Book.

Chicago Style (17th ed.) Citation

Crockett, Charles Winthrop. Elements of Plane Trigonometry. New York: American Book, 1903.

MLA (9th ed.) Citation

Crockett, Charles Winthrop. Elements of Plane Trigonometry. American Book, 1903.