Harcourt, H. M. (1974). Introduction to physical geography (2nd ed.). Harcourt Brace Jovanovich.
Chicago-čujuhus (17. p.)Harcourt, Henry M. Introduction to Physical Geography. 2nd ed. New York: Harcourt Brace Jovanovich, 1974.
MLA-čujuhus (9. p.)Harcourt, Henry M. Introduction to Physical Geography. 2nd ed. Harcourt Brace Jovanovich, 1974.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.