Thornbury, W. D. (1969). Principles Geomorphology. Wiley.
Chicago-čujuhus (17. p.)Thornbury, William David. Principles Geomorphology. New York: Wiley, 1969.
MLA-čujuhus (9. p.)Thornbury, William David. Principles Geomorphology. Wiley, 1969.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.