Kathleen Weidner Zoehfeld. (2012). National Geographic Readers: Rocks and Minerals (39197th.). National Geographic Children's Books.
Chicago-čujuhus (17. p.)Kathleen Weidner Zoehfeld. National Geographic Readers: Rocks and Minerals. 39197th. National Geographic Children's Books, 2012.
MLA-čujuhus (9. p.)Kathleen Weidner Zoehfeld. National Geographic Readers: Rocks and Minerals. 39197th. National Geographic Children's Books, 2012.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.