Ashbrook, P. (2003). Science is simple: Over 250 activities for preschoolers. Gryphon House.
Lua i Stíl Chicago (17ú heag.)Ashbrook, Peggy. Science Is Simple: Over 250 Activities for Preschoolers. Beltsville, Md: Gryphon House, 2003.
Lua MLA (9ú heag.)Ashbrook, Peggy. Science Is Simple: Over 250 Activities for Preschoolers. Gryphon House, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.