Earthwatch: The Journal of Earthwatch Institute. Earthwatch Institute.
Chicago-čujuhus (17. p.)Earthwatch: The Journal of Earthwatch Institute. Earthwatch Institute.
MLA-čujuhus (9. p.)Earthwatch: The Journal of Earthwatch Institute. Earthwatch Institute.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.