Cullingford, R. (1980). Timescales in geomorphology. John Wiley and Sons.
Chicago-čujuhus (17. p.)Cullingford, R.A. Timescales in Geomorphology. New York: John Wiley and Sons, 1980.
MLA-čujuhus (9. p.)Cullingford, R.A. Timescales in Geomorphology. John Wiley and Sons, 1980.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.