BRIN, D. (1994). The practice effect. Bantam Books.
Chicago-čujuhus (17. p.)BRIN, David. The Practice Effect. Bantam Books, 1994.
MLA-čujuhus (9. p.)BRIN, David. The Practice Effect. Bantam Books, 1994.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.