第一篇 DeHoog, Ruth H. “Competition, Negotiation, and Cooperation: Three Models for Service Contracting,”             Administration and Society 22 (November 1990): 317-340.
第二篇 DeHoog, Ruth H.  “Human Services Contracting: Environmental, Behavioral, and Organizational Conditions,”   
Administration and Society 16 (Feb. 1985): 427-454.

谢谢大家