Farrell, Henry, and Louise Holten. "Collective Goods in the Local Economy: The Packaging Machinery Cluster in Bologna." Changing Governance of Local Economies: Responses of European Local Production Systems. : Oxford University Press, 2004-02-26. Oxford Scholarship Online. 2006-02-01. Date Accessed 19 Jun. 2013 <http://www.oxfordscholarship.com/view/10.1093/0199259402.001.0001/acprof-9780199259403-chapter-3>.
Farrell, H., & Holten, L.(2004-02-26). Collective Goods in the Local Economy: The Packaging Machinery Cluster in Bologna. In Changing Governance of Local Economies: Responses of European Local Production Systems. : Oxford University Press. Retrieved 19 Jun. 2013, from http://www.oxfordscholarship.com/view/10.1093/0199259402.001.0001/acprof-9780199259403-chapter-3.
Farrell, Henry, and Louise Holten. "Collective Goods in the Local Economy: The Packaging Machinery Cluster in Bologna." In Changing Governance of Local Economies: Responses of European Local Production Systems. : Oxford University Press, 2004-02-26. http://www.oxfordscholarship.com/view/10.1093/0199259402.001.0001/acprof-9780199259403-chapter-3.
Farrell H, Holten L. Collective Goods in the Local Economy: The Packaging Machinery Cluster in Bologna. In: Crouch C, Le Galès P, Trigilia C, Voelzkow H. Changing Governance of Local Economies: Responses of European Local Production Systems. Oxford University Press; 2004. http://www.oxfordscholarship.com/view/10.1093/0199259402.001.0001/acprof-9780199259403-chapter-3. Accessed June 19, 2013.