Clear writing and Rédaction claire are guides that are perfect for writing business texts. It is the result of the many years of training and coaching experience of Greet De Baets and Anne Vervier. Companies and organizations in the Benelux, e.g. the European Commission, have often called on Anne and Greet to organize writing training courses as a tandem. Anne in French; Greet in Dutch or English, sometimes also German.
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You will also find some non-academic publications in magazines and blogs.