Λουάντα: Διαφορά μεταξύ των αναθεωρήσεων

*{{Flagicon|POR}} [[Λισαβόνα]], [[Πορτογαλία]]<ref name="Lisbon twinnings">{{cite web|url=http://www.anmp.pt/anmp/pro/mun1/gem101l0.php?cod_ent=M1100|title=Lisboa - Geminações de Cidades e Vilas|accessdate=2020-10-07|work=Associação Nacional de Municípios Portugueses [National Association of Portuguese Municipalities]|language=pt|trans-title=Lisbon - Twinning of Cities and Towns|archive-url=https://web.archive.org/web/20150201175323/http://www.anmp.pt/anmp/pro/mun1/gem101l0.php?cod_ent=M1100|archive-date=2015-02-01|url-status=livedead}}</ref><ref name="Lisbon twinnings 2">{{cite web|url=http://www.cm-lisboa.pt/municipio/relacoes-internacionais |title=Acordos de Geminação, de Cooperação e/ou Amizade da Cidade de Lisboa |accessdate=2020-10-07 |work=Camara Municipal de Lisboa |language=pt |trans-title=Lisbon - Twinning Agreements, Cooperation and Friendship |url-status=dead |archiveurl=https://web.archive.org/web/20131031202617/http://www.cm-lisboa.pt/municipio/relacoes-internacionais |archivedate=2013-10-31 }}</ref><ref name="Porto International">{{cite web|url=http://www.cm-porto.pt/document/449218/481584.pdf |title=International Relations of the City of Porto |publisher=Municipal Directorate of the Presidency Services International Relations Office |accessdate=2020-10-07 |url-status=dead |archiveurl=https://web.archive.org/web/20120113054303/http://www.cm-porto.pt/document/449218/481584.pdf |archivedate=2012-01-13 }}</ref><ref name="Associação Porto Digital">{{cite web |author=Associação Porto Digital |url=http://www.cm-porto.pt/gen.pl?sid=cmp.sections/521 |title=C.M. Porto |publisher=Cm-porto.pt |accessdate=2020-10-07 |url-status=dead |archiveurl=https://web.archive.org/web/20110515093608/http://www.cm-porto.pt/gen.pl?sid=cmp.sections%2F521 |archivedate=2011-05-15 }}</ref>