Helfand David P. Career change : everything you need to know to meet new challenges and take control of your career / David P. Helfand. - Lincolnwood, Ill. : YGM Career Horizons, c1995. - 318p. : ill. ; 23 cm. Includes bibliographical references and index. ISBN: 0844242748 Subjects--Topical Terms: Career changes.Vocational guidance.