Port: юрамалар арасында аерма

*[http://www.ncdc.noaa.gov/oa/esb/?goal=commerce&file=obs/marine/ports/ Social & Economic Benefits of PORTS] from "NOAA Socioeconomics" website initiative

* Antunes, Cátia: [http://nbn-resolving.de/urn:nbn:de:0159-2010102547 ''Early Modern Ports, 1500-1750''], [[European History Online]], Mainz: [[Institute of European History]], 2011, retrieved: November 2, 2011.