Frailey L.E & Mamchak Susan. (1993). Hanbook of Business Letters (3rd Edition.). Super Book House.
Chicago-čujuhus (17. p.)Frailey L.E juo Mamchak Susan. Hanbook of Business Letters. 3rd Edition. Bombay: Super Book House, 1993.
MLA-čujuhus (9. p.)Frailey L.E juo Mamchak Susan. Hanbook of Business Letters. 3rd Edition. Super Book House, 1993.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.