Try to look for a good format to start with. Reference letters are all the same. It is very simple to construct one. Just put all the strength your friends has and put in the letter that your friend has a good working attitude when working. www.writeletters.net/category/warning-letter

It should be truthful, and very formal. Tell them what your nephew has done to your community and include the strength of your nephew. www.writeletters.net/category/warning-letter