Unesco. (1975). Teacher's study guide on the biology of human populations. Unesco Press.
Lua i Stíl Chicago (17ú heag.)Unesco. Teacher's Study Guide on the Biology of Human Populations. Paris: Unesco Press, 1975.
Lua MLA (9ú heag.)Unesco. Teacher's Study Guide on the Biology of Human Populations. Unesco Press, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.