ANDERSON, B. (1990). GEM TESTING. BUTTERWORTH.
Chicago-čujuhus (17. p.)ANDERSON, B.W. GEM TESTING. NEW DELHI: BUTTERWORTH, 1990.
MLA-čujuhus (9. p.)ANDERSON, B.W. GEM TESTING. BUTTERWORTH, 1990.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.