FLAVELL., J. H. Cognitive Development.
Lua i Stíl Chicago (17ú heag.)FLAVELL., John H. Cognitive Development.
Lua MLA (8ú heag.)FLAVELL., John H. Cognitive Development.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)