Erny, P. (1968). Childhood and cosmos: The social psychology of the black african child. new perspective.
Lua i Stíl Chicago (17ú heag.)Erny, Pierre. Childhood and Cosmos: The Social Psychology of the Black African Child. New York: new perspective, 1968.
Lua MLA (9ú heag.)Erny, Pierre. Childhood and Cosmos: The Social Psychology of the Black African Child. new perspective, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.