APA (7th ed.) Citation

Warner, W. L., & Srole, L. (1945). The social systems of American ethnic groups. Yale university press.

Chicago Style (17th ed.) Citation

Warner, William Lloyd, and Leo Srole. The Social Systems of American Ethnic Groups. New Haven: Yale university press, 1945.

MLA (9th ed.) Citation

Warner, William Lloyd, and Leo Srole. The Social Systems of American Ethnic Groups. Yale university press, 1945.