Smith, P., Berry, C., & Pulford, A. (2002). Encyclopedia of strategic management: Marketing communications vol. 5. Crest Publishing House.

Smith, Paul, Chris Berry, and Alan Pulford. Encyclopedia of Strategic Management: Marketing Communications Vol. 5. New Delhi: Crest Publishing House, 2002.

Smith, Paul, et al. Encyclopedia of Strategic Management: Marketing Communications Vol. 5. Crest Publishing House, 2002.