I need guide book to writing effective business correspondence.
I need that for my work – business correspondence with foreign clients.
I have been considering:
http://www.oup.com/elt/catalogue/isbn/5932?cc=global
and
http://sklep.nau.pl/produkt.php?id=652
First of them costs 3 times more than second.
Maybe some other proposition?
I looking forward you advise me something
Michal