Regents pub. co. (1977). The Blue book of business English. Regent Pub.
Chicago-čujuhus (17. p.)Regents pub. co. The Blue Book of Business English. New york: Regent Pub, 1977.
MLA-čujuhus (9. p.)Regents pub. co. The Blue Book of Business English. Regent Pub, 1977.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.