Sullivan, T. J. (1988). Introduction to social problems. Macmillan.
Lua i Stíl Chicago (17ú heag.)Sullivan, Thomas J. Introduction to Social Problems. Macmillan, 1988.
Lua MLA (9ú heag.)Sullivan, Thomas J. Introduction to Social Problems. Macmillan, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.