Goldman, S. L., Nagel, R. N., & Preiss, K. (1995). Agile competitors and virtual organizations: Strategies for enriching the customer. Van Nostrand Reinhold.

Goldman, Steven L., Roger N. Nagel, and Kenneth Preiss. Agile Competitors and Virtual Organizations: Strategies for Enriching the Customer. New York: Van Nostrand Reinhold, 1995.

Goldman, Steven L., et al. Agile Competitors and Virtual Organizations: Strategies for Enriching the Customer. Van Nostrand Reinhold, 1995.