Trewartha, . G. T., Robinson, A. H., & Hammond, E. H. (1968). Fundamentals of physical geography (2nd ed.). McGraw-Hill.
Chicago-čujuhus (17. p.)Trewartha, Glenn T., Arthur H. Robinson, juo Edwin H. Hammond. Fundamentals of Physical Geography. 2nd ed. New York: McGraw-Hill, 1968.
MLA-čujuhus (9. p.)Trewartha, Glenn T., et al. Fundamentals of Physical Geography. 2nd ed. McGraw-Hill, 1968.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.