1. Kotler, Philip. 2001. Marketing Management. Millennium edition. New York: Prentice Hall, p. 537.
2. This definition was developed through Council of Logistics Management, Oak Brook, Illinois.
3. Christopher, Martin. 1994. New Direction in Logistics. Logistics Distribution Planning, Edited by James Cooper. London: Kogan Page, p. 17.
4. Christopher, Martin. 1986. The Strategy of Distribution Management, Gower Publishing Co Aldershot, Hampshire, UK.