Παραπομπή APA

Notteboom, T., Ducruet, C., & Langen, P. W. d. (2009). Ports in proximity: Competition and coordination among adjacent seaports. Farnham, England: Ashgate Pub..

Παραπομπή Chicago Style

Notteboom, Theo., Cβesar Ducruet, and Peter W. de Langen. Ports in Proximity: Competition and Coordination Among Adjacent Seaports. Farnham, England: Ashgate Pub., 2009.

Παραπομπή MLA

Notteboom, Theo., Cβesar Ducruet, and Peter W. de Langen. Ports in Proximity: Competition and Coordination Among Adjacent Seaports. Farnham, England: Ashgate Pub., 2009.

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