Lancaster, G. (2002). Encyclopedia of strategic management: Marketing planning and evaluation vol. 1. Crest Publishing House.
Lua i Stíl Chicago (17ú heag.)Lancaster, Geoffrey. Encyclopedia of Strategic Management: Marketing Planning and Evaluation Vol. 1. New Delhi: Crest Publishing House, 2002.
Lua MLA (8ú heag.)Lancaster, Geoffrey. Encyclopedia of Strategic Management: Marketing Planning and Evaluation Vol. 1. Crest Publishing House, 2002.
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