Schwartz, B., & Beverly Schwartz; foreword by Bill Drayton. Rippling: How social entrepreneurs spread innovation throughout the world. San Francisco: Jossey-Bass.

Schwartz, Beverly, و Beverly Schwartz; foreword by Bill Drayton. Rippling: How Social Entrepreneurs Spread Innovation Throughout the World. San Francisco: Jossey-Bass.

Schwartz, Beverly, و Beverly Schwartz; foreword by Bill Drayton. Rippling: How Social Entrepreneurs Spread Innovation Throughout the World. San Francisco: Jossey-Bass.