Gaya APA
      W, P., Langen, D. (2004).
    Collective action regimes in seaport clusters : the case of the lower Mississippi port cluster .
    Netherlands:
  Elsevier.
  
Gaya MLA
      W, Peter., Langen, De.
    "Collective action regimes in seaport clusters : the case of the lower Mississippi port cluster".
    
    Netherlands:
  Elsevier,
  2004.
  Article.