
Tegundin Chrysemys picta sem má kalla blettaskjaldböku er útbreiddasta skjaldbaka Norður-Ameríku og jafnframt sú tegund sem teygir heimkynni sín lengst í norður.
- Anders G.J. Rhodin o.fl. (2017). Turtles of the World: Annotated Checklist and Atlas of Taxonomy, Synonymy, Distribution, and Conservation Status (8th útg.). Conservation Biology of Freshwater Turtles and Tortoises: A Compilation Project of the IUCN/SSC Tortoise and Freshwater Turtle Specialist Group. Chelonian Research Monographs 7:1–292.
- Karen Eckert, David Gulko (2004). Sea Turtles: An Ecological Guide. Honolulu, Mutual Publishing.
- Carl J Franklin (2007). Turtles: An Extraordinary Natural History 245 Million Years in the Making. St. Paul, Voyageur Press.
- Eastern Painted Turtle (Chrysemys picta picta).jpg - Wikimedia Commons. (Sótt 6. 4. 2018).