Ferratt. Proceedings of the 1991 conference on SIGCPR. Association for Computing Machinery (ACM).
Chicago-čujuhus (17. p.)Ferratt. Proceedings of the 1991 Conference on SIGCPR. Association for Computing Machinery (ACM).
MLA-čujuhus (9. p.)Ferratt. Proceedings of the 1991 Conference on SIGCPR. Association for Computing Machinery (ACM).
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.