Barnes, H. E., & Davis, J. (1931). An introduction to sociology. D.C. Heath.
Lua i Stíl Chicago (17ú heag.)Barnes, Harry E., agus Jerome Davis. An Introduction to Sociology. Boston: D.C. Heath, 1931.
Lua MLA (9ú heag.)Barnes, Harry E., agus Jerome Davis. An Introduction to Sociology. D.C. Heath, 1931.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.