Porsche, Volkswagen, and CSX : cars, trains, and derivatives - Stowell, David P., (SAGE Publications Ltd, 2017)
Originally published: Stowell, D., & McLarty, T. (2009). Porsche, Volkswagen, and CSX: Cars, Trains, and Derivatives. 5-209-250. Evanston, IL: Kellogg School of Management, Northwestern University.