APA (7th ed.) Citation

Cook, H. C. (1920). Littleman's book of courtesy. E. P. Dutton.

Chicago Style (17th ed.) Citation

Cook, Henry Caldwell. Littleman's Book of Courtesy. New York: E. P. Dutton, 1920.

MLA (8th ed.) Citation

Cook, Henry Caldwell. Littleman's Book of Courtesy. E. P. Dutton, 1920.