(2020). Geoscience: Concepts and applied principles. Syrawood.
Chicago-čujuhus (17. p.)Geoscience: Concepts and Applied Principles. New York: Syrawood, 2020.
MLA-čujuhus (9. p.)Geoscience: Concepts and Applied Principles. Syrawood, 2020.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.