DRUCKER, Peter F. The Five Most Important Questions You Will Ever Ask About Your Nonprofit Organization : Participant's Workbook. The Drucker Foundation Self-Assessment Tool For Nonprofit Organizations. 1. ed. San Francisco : Jossey-Bass Publ., 1993. 61 s. The Jossey-Bass Nonprofit Sector Series. ISBN 1-55542-595-X. [Copy count : 7, currently available 7, at library only 0]