APA (7th ed.) Citation

Ellwood, C. A. (1919). Sociology and modern social problems (New ed.). American book company.

Chicago Style (17th ed.) Citation

Ellwood, Charles Abram. Sociology and Modern Social Problems. New ed. New York: American book company, 1919.

MLA (9th ed.) Citation

Ellwood, Charles Abram. Sociology and Modern Social Problems. New ed. American book company, 1919.