Leving, G. R. (1982). Child psychology. Brooks/Cale Publ.
Lua i Stíl Chicago (17ú heag.)Leving, Gerald R. Child Psychology. Brooks/Cale Publ, 1982.
Lua MLA (8ú heag.)Leving, Gerald R. Child Psychology. Brooks/Cale Publ, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.