Sharma ,Prem V. (1997). Environmental and engineering geophysics. Univ. pr..
Chicago-čujuhus (17. p.)Sharma ,Prem V. Environmental and Engineering Geophysics. Cambridge: Univ. pr., 1997.
MLA-čujuhus (9. p.)Sharma ,Prem V. Environmental and Engineering Geophysics. Univ. pr., 1997.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.