Kathleen Weidner Zoehfeld. (2002). "Dinosaurs Big and Small (Let's-Read-and-Find-Out Science, Stage 1)". HarperCollins.
Čikaški stil citiranja (17. izdanje)Kathleen Weidner Zoehfeld. "Dinosaurs Big and Small (Let's-Read-and-Find-Out Science, Stage 1)". HarperCollins, 2002.
MLA način citiranja (9. izdanje)Kathleen Weidner Zoehfeld. "Dinosaurs Big and Small (Let's-Read-and-Find-Out Science, Stage 1)". HarperCollins, 2002.
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