Kathleen Weidner Zoehfeld. (2002). "Dinosaurs Big and Small (Let's-Read-and-Find-Out Science, Stage 1)". HarperCollins.
Lua i Stíl Chicago (17ú heag.)Kathleen Weidner Zoehfeld. "Dinosaurs Big and Small (Let's-Read-and-Find-Out Science, Stage 1)". HarperCollins, 2002.
Lua MLA (9ú heag.)Kathleen Weidner Zoehfeld. "Dinosaurs Big and Small (Let's-Read-and-Find-Out Science, Stage 1)". HarperCollins, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.