Greenland, D. (1977). The earth in profile: A physical geography. Confield.
Chicago-čujuhus (17. p.)Greenland, David. The Earth in Profile: A Physical Geography. San Francisco: Confield, 1977.
MLA-čujuhus (9. p.)Greenland, David. The Earth in Profile: A Physical Geography. Confield, 1977.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.