Cohen, L. G. (1998). Assessment of children and youth. Longman.
Lua i Stíl Chicago (17ú heag.)Cohen, Libby G. Assessment of Children and Youth. New York: Longman, 1998.
Lua MLA (9ú heag.)Cohen, Libby G. Assessment of Children and Youth. Longman, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.