ผลต่างระหว่างรุ่นของ "สายพิคะดิลี"

* {{cite web |last= |first= |title=Piccadilly line facts |url=http://www.tfl.gov.uk/corporate/modesoftransport/londonunderground/keyfacts/13175.aspx |work=www.tfl.gov.uk |publisher=Transport for London |date= |accessdate=12 April 2011 |archive-date=2014-02-10 |archive-url=https://web.archive.org/web/20140210035233/http://www.tfl.gov.uk/corporate/modesoftransport/londonunderground/keyfacts/13175.aspx |url-status=dead }}

* {{cite web |url=http://www.architecture.com/LibraryDrawingsAndPhotographs/Exhibitionsandloans/VARIBAArchitecturePartnershipexhibitions/UndergroundJourneys/ChangingthefaceofLondonUnderground/ChangingTheFaceOfLondonUnderground.aspx |title=Underground Journeys: Changing the face of London Underground Illustrated history of the Piccadilly line 1920-1930s |work=www.architecture.com |publisher=[[Royal Institute of British Architects]] |date= |accessdate=19 February 2011 |archive-date=2011-05-04 |archive-url=https://web.archive.org/web/20110504024645/http://www.architecture.com/LibraryDrawingsAndPhotographs/Exhibitionsandloans/VARIBAArchitecturePartnershipexhibitions/UndergroundJourneys/ChangingthefaceofLondonUnderground/ChangingTheFaceOfLondonUnderground.aspx |url-status=dead }}