Gresswell,. (1967). Physical geography. Frederick A. Praeger.
Chicago-čujuhus (17. p.)Gresswell. Physical Geography. New York: Frederick A. Praeger, 1967.
MLA-čujuhus (9. p.)Gresswell. Physical Geography. Frederick A. Praeger, 1967.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.