I have found some good advices if you have to do a writing letter application. AT http://www.engineers-international.com/ ... tters.html they explain how Writing job application letters....
The letter should be clear, concise and straight to the point. There should be your address and the date. Following this, on the left hand side you should address it. Ensure you include the name of the person, their title, company name, address and any position reference number. This is probably obvious, but ensure that you spell their name correctly, nothing worse than receiving a letter incorrectly addressed or misspelled. It gives a poor first impression.
Finish the letter by adding a closing remark, either "yours sincerely", "yours faithfully' or whatever you feel comfortable with and obeying general letter writing etiquette. Leave a few spaces for your signature and then place your full name.
Before you mail the application letter, read it over again, making sure that it is perfect. Special attention should be placed to ensure the letter:
It is not too long.
There are no grammar or spelling errors.
That you have answered the job requirements.
The application letter flows and is easy to read.
I think there are good advices!