For ariannna Rimes
http://investor.harley-
http://www.tutor2u.net/business/strategy/competitive_advantage.htm
Quickmba.com (2010). Porter’s Generic Strategies. Quick MBA. Retrieved August, 2011, from http://www.quickmba.com/strategy/generic.shtml
Tutor2u.net (2011). Competitive advantage. Retrieved, from: http://www.tutor2u.net/business/strategy/competitive_advantage.htm
Looney, D. C., & Ryerson, A. (2011). Lehman Trikes: A story within a story. Journal Of The International Academy For Case Studies, 17(7), 45-58. (Available via the Library by way of the EBSCO database).