Swedlund, A. (1976). Demographic anthropology. W.M.C Brown Company.
Lua i Stíl Chicago (17ú heag.)Swedlund, Alan. Demographic Anthropology. NULL: W.M.C Brown Company, 1976.
Lua MLA (9ú heag.)Swedlund, Alan. Demographic Anthropology. W.M.C Brown Company, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.