1. Arnold, U. (1998), “Purchasing consortia as a strategic weapon for highly decentralised multi‐divisional companies: finding from four case studies”, in Capaldo, G., Espoitio, E., lo Storo, C. and Raffa, M. (Eds), Supply Management, Ingegneria Economico‐gestionale, Naples, pp. 34‐54.
2. Aylesworth, M.M. (2007), “Consortia purchasing for higher education in Canada, the US, the UK and Australia”, in Knight, L., Harland, C., Telgen, J., Thai, K.V., Callendar, C. and McHen, H. (Eds), Public Procurement: International Case and Commentary, Routledge, London, pp. 176‐89.
3. Babbie, E. (1995), The Practice of Social Research, 7th ed., Wadsworth, Belmont, CA.
4. Baily, P., Farmer, D., Jessop, D. and Jones, D. (1994), Purchasing Principles and Management, 7th ed., Pitman, London.
5. Bakker, E., Walker, H. and Harland, C. (2006), “Organising for collaborative procurement: an initial conceptual framework”, in Piga, G. and Thai, K.V. (Eds), Advancing Public Procurement: Practices, Innovation and Knowledge‐sharing, PrAcdemics Press, Boca Raton, FL, pp. 14‐44.