Gredler, M. E., & Shields, C. C. (2008). Vygotsky's legacy: A foundation for research and practice. Guilford Press.
Lua i Stíl Chicago (17ú heag.)Gredler, Margaret E., agus Carolyn Claytor Shields. Vygotsky's Legacy: A Foundation for Research and Practice. New York: Guilford Press, 2008.
Lua MLA (9ú heag.)Gredler, Margaret E., agus Carolyn Claytor Shields. Vygotsky's Legacy: A Foundation for Research and Practice. Guilford Press, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.