The Assertiveness Handbookde Mary HartleyMateriasAssertiveness (psychology)Ediciones (1)The Assertiveness Handbook (2006)Sheldon Press · inglés · ISBN 9780859699419Más obras de Mary HartleyWilliam Golding's Lord of the fliesThe Busy Womans HandbookThe Smart Girls Guide To Getting What You Want How To Be Assertive With Wit Style And Grace