Inscrivez-vous ou connectez-vous pour rejoindre votre communauté professionnelle.
From school, long ago I remember a good author: Ron S. Blicq, he has a series of books with 'Technically-Write' in the titles. Even an older volume would have good principles and formats, plus exercises, for you to use. You could find them on-line and research which one suits you best from there.
