Schwartz, Beverly, Rippling : how social entrepreneurs spread innovation throughout the world / Beverly Schwartz ; foreword by Bill Drayton. - 1st ed. - San Francisco : Jossey-Bass, 2012. - 269 p. HKBU Library ISBN: 9781118138595 1118138597 Subjects--Topical Terms: Social entrepreneurship.Social change. LC Class. No.: HD60 / S399 R 2012