Ellwood, C. A. (1932). Social problems, a sociology. Cincinnati [etc.] American book company.
Lua i Stíl Chicago (17ú heag.)Ellwood, Charles Abram. Social Problems, a Sociology. New York: Cincinnati [etc.] American book company, 1932.
Lua MLA (9ú heag.)Ellwood, Charles Abram. Social Problems, a Sociology. Cincinnati [etc.] American book company, 1932.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.