APA (7th ed.) Citation

Ellwood, C. A. (1924). Sociology and modern social problems (New edition --revised.). American Book Co.

Chicago Style (17th ed.) Citation

Ellwood, Charles Abram. Sociology and Modern Social Problems. New edition --revised. New York: American Book Co, 1924.

MLA (9th ed.) Citation

Ellwood, Charles Abram. Sociology and Modern Social Problems. New edition --revised. American Book Co, 1924.