File:Michael Porter.jpgDescriptionMichael Porter.jpg Català: Michael Porter. Čeština: Michael Porter. Dansk: Michael Porter. Deutsch: Michael Porter. Español: Michael Porter. Suomi:
File:Michael porter.jpgDescriptionMichael porter.jpg Español: Michael Porter 5 Fuerzas Date 10 November 2013, 18:28:07 Source Own work Author Yesicavaldez
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