Bentzen, W. R. (1993). Seeing young children: A guide to observing and recording behavior (2nd ed.). Delmar.
Lua i Stíl Chicago (17ú heag.)Bentzen, Warren R. Seeing Young Children: A Guide to Observing and Recording Behavior. 2nd ed. New York: Delmar, 1993.
Lua MLA (9ú heag.)Bentzen, Warren R. Seeing Young Children: A Guide to Observing and Recording Behavior. 2nd ed. Delmar, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.