26114706
9781453835999
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Wirth, John is the author of 'How to Be A Powerful Public Speaker : A Collection of Tips for Public Speaking Including Basic Public Speaking Techniques to Help You Overcome the Fear of Public Speaking So You Can Make Effective Presentations and Be More Believable and Convincing in Fro', published 2010 under ISBN 9781453835999 and ISBN 1453835997.
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