Sluss, D. J. (2005). Supporting play: Birth through age eight. Thomson Delmar Learning.
Chicago-referens (17:e uppl.)Sluss, Dorothy Justus. Supporting Play: Birth Through Age Eight. Clifton Park, NY: Thomson Delmar Learning, 2005.
MLA-referens (8:e uppl.)Sluss, Dorothy Justus. Supporting Play: Birth Through Age Eight. Thomson Delmar Learning, 2005.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.