Wainwright, G. (1999). Tricky business letters. Universities Press.
Chicago-čujuhus (17. p.)Wainwright, Gordon. Tricky Business Letters. Hyderabad: Universities Press, 1999.
MLA-čujuhus (9. p.)Wainwright, Gordon. Tricky Business Letters. Universities Press, 1999.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.