Writing correspondance : https://www.thebalance.com/business-letter-examples-samples-and-writing-tips-2059673
English for emails https://learnenglish.britishcouncil.org/en/english-emails
Writing correspondance : https://www.thebalance.com/business-letter-examples-samples-and-writing-tips-2059673
English for emails https://learnenglish.britishcouncil.org/en/english-emails