Shaun Richardson, Ed Dennison: Garden and Other Earthworks, South of Wressle Castle, Wressle, East Yorkshire: Archaeological Survey. Ed Dennison Archaeological Services and the Castle Studies Trust, 2015, S. 7–8. castlestudiestrust.org.uk (PDF; 14 MB) abgerufen am 25. April 2016.
Shaun Richardson, Ed Dennison: Garden and Other Earthworks, South of Wressle Castle, Wressle, East Yorkshire: Archaeological Survey. Ed Dennison Archaeological Services and the Castle Studies Trust, 2015, S. 9. castlestudiestrust.org.uk (PDF; 14 MB) abgerufen am 25. April 2016.
Shaun Richardson, Ed Dennison: Garden and Other Earthworks, South of Wressle Castle, Wressle, East Yorkshire: Archaeological Survey. Ed Dennison Archaeological Services and the Castle Studies Trust, 2015, S. 12. castlestudiestrust.org.uk (PDF; 14 MB) abgerufen am 25. April 2016.
Shaun Richardson, Ed Dennison: Garden and Other Earthworks, South of Wressle Castle, Wressle, East Yorkshire: Archaeological Survey. Ed Dennison Archaeological Services and the Castle Studies Trust, 2015, S. 14–15. castlestudiestrust.org.uk (PDF; 14 MB) abgerufen am 25. April 2016.
Shaun Richardson, Ed Dennison: Garden and Other Earthworks, South of Wressle Castle, Wressle, East Yorkshire: Archaeological Survey. Ed Dennison Archaeological Services and the Castle Studies Trust, 2015, S. 1–2. castlestudiestrust.org.uk (PDF; 14 MB) abgerufen am 25. April 2016.
Shaun Richardson, Ed Dennison: Garden and Other Earthworks, South of Wressle Castle, Wressle, East Yorkshire: Archaeological Survey. Ed Dennison Archaeological Services and the Castle Studies Trust, 2015, S. 41–43. castlestudiestrust.org.uk (PDF; 14 MB) abgerufen am 25. April 2016.
Shaun Richardson, Ed Dennison: Garden and Other Earthworks, South of Wressle Castle, Wressle, East Yorkshire: Archaeological Survey. Ed Dennison Archaeological Services and the Castle Studies Trust, 2015, S. 20–21, 28, 43–45, 52–56. castlestudiestrust.org.uk (PDF; 14 MB) abgerufen am 25. April 2016.
Shaun Richardson, Ed Dennison: Garden and Other Earthworks, South of Wressle Castle, Wressle, East Yorkshire: Archaeological Survey. Ed Dennison Archaeological Services and the Castle Studies Trust, 2015, S. 17, 46, 50–54. castlestudiestrust.org.uk (PDF; 14 MB) abgerufen am 25. April 2016.
R. W. Hoyle: Percy, Henry Algernon, fifth earl of Northumberland (1478–1527). In: Henry Colin Gray Matthew, Brian Harrison (Hrsg.): Oxford Dictionary of National Biography, from the earliest times to the year 2000 (ODNB). Oxford University Press, Oxford 2004, ISBN 0-19-861411-X; doi:10.1093/ref:odnb/21936 (Lizenz erforderlich), Stand: 2004.
R. W. Hoyle: Percy, Henry Algernon, sixth earl of Northumberland (c.1502 – 1537). In: Henry Colin Gray Matthew, Brian Harrison (Hrsg.): Oxford Dictionary of National Biography, from the earliest times to the year 2000 (ODNB). Oxford University Press, Oxford 2004, ISBN 0-19-861411-X; doi:10.1093/ref:odnb/21937 (Lizenz erforderlich), Stand: 2004.
Ruins of Wressle Castle. Historic England. English Heritage. historicengland.org.uk, abgerufen am 25. April 2016.
Wressle Castle. Historic England. English Heritage. historicengland.org.uk, abgerufen am 25. April 2016.
The bakehouse at Wressle Castle approximately 30 metres north of ruins of Wressle Castle. Historic England. English Heritage. historicengland.org.uk, abgerufen am 25. April 2016.
Wressle Castle. Pastscape: Historic England. English Heritage. pastscape.org.uk, abgerufen am 25. April 2016.
whiterose.ac.uk
etheses.whiterose.ac.uk
Lila Rakoczy: Archaeology of destruction: a reinterpretation of castle slightings in English Civil War. PhD-Arbeit der University of York, York 2007. etheses.whiterose.ac.uk, abgerufen am 25. April 2016.
Lila Rakoczy: Archaeology of destruction: a reinterpretation of castle slightings in English Civil War. PhD-Arbeit der University of York, York 2007, S. 101. etheses.whiterose.ac.uk, abgerufen am 25. April 2016.
Eric John Fisher: Some Yorkshire estates of the Percies, 1450–1650. PhD-Arbeit der University of Leeds, Leeds 1954, S. 4. etheses.whiterose.ac.uk, abgerufen am 25. April 2016.