Liebert, R. M., & Sprafkin, J. (1988). The early window: Effects of television on children and youth (3rd ed.). Pergamon Press.
Lua i Stíl Chicago (17ú heag.)Liebert, Robert M., agus Joyce Sprafkin. The Early Window: Effects of Television on Children and Youth. 3rd ed. New York: Pergamon Press, 1988.
Lua MLA (9ú heag.)Liebert, Robert M., agus Joyce Sprafkin. The Early Window: Effects of Television on Children and Youth. 3rd ed. Pergamon Press, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.