Watford Central tube station (English Wikipedia)

"Second schedule Part VI - The Lewis undertaking". London Passenger Transport Act 1933. Parliament of the United Kingdom/National Archives. 1933. Archived from the original on 29 September 2013.

ltmcollection.org

Unknown Artist (1925). "By 'Metro' to Watford". London Transport Museum poster collection. Archived from the original on 9 August 2013. Retrieved 13 July 2021.
Unknown photographer (1927). "Inventory no: 1999/28830 – Photograph of Metropolitan Railway single deck coach outside Watford MR station". London Transport Museum photographic collection. Archived from the original on 9 August 2013. Retrieved 13 July 2021.

"Metropolitan line extension - Transport for London". Archived from the original on 17 July 2017. Retrieved 2 June 2016.
"Croxley Rail Link". Transport for London. Archived from the original on 2 December 2008.

"44 High Street". Locally Listed Buildings in Watford. Watford Borough Council. 2011. p. 55. Archived from the original (PDF) on 29 September 2013.

Unknown Artist (1925). "By 'Metro' to Watford". London Transport Museum poster collection. Archived from the original on 9 August 2013. Retrieved 13 July 2021.
Unknown photographer (1927). "Inventory no: 1999/28830 – Photograph of Metropolitan Railway single deck coach outside Watford MR station". London Transport Museum photographic collection. Archived from the original on 9 August 2013. Retrieved 13 July 2021.
"44 High Street". Locally Listed Buildings in Watford. Watford Borough Council. 2011. p. 55. Archived from the original (PDF) on 29 September 2013.
"Second schedule Part VI - The Lewis undertaking". London Passenger Transport Act 1933. Parliament of the United Kingdom/National Archives. 1933. Archived from the original on 29 September 2013.
Binnie, Adam (17 December 2011). "Croxley Rail Link project to resurrect historic track". Watford Observer. Archived from the original on 10 August 2013.
"Metropolitan line extension - Transport for London". Archived from the original on 17 July 2017. Retrieved 2 June 2016.
"Croxley Rail Link". Transport for London. Archived from the original on 2 December 2008.