Rodgers, G. B. (1977). Demography and distribution. International Labour Office.
Lua i Stíl Chicago (17ú heag.)Rodgers, G. B. Demography and Distribution. Geneva: International Labour Office, 1977.
Lua MLA (9ú heag.)Rodgers, G. B. Demography and Distribution. International Labour Office, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.