Freeman, T. (2003). Environmental geology laboratory. New York : John Wiley & Sons.
Chicago-čujuhus (17. p.)Freeman, Tom. Environmental Geology Laboratory. New York : John Wiley & Sons, 2003.
MLA-čujuhus (9. p.)Freeman, Tom. Environmental Geology Laboratory. New York : John Wiley & Sons, 2003.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.