Steele, ED (1991). "Party: Whigs and Liberals". Palmerston and Liberalism: 1855-1865. Cambridge: Cambridge University Press. pp. 84–85. ISBN978-0-521-40045-9. Retrieved 10 May 2018 – via Google Books.
Coohill, Joseph (17 October 2011). "Chapter 5. Appropriation and the Formation of the Parliamentary Liberal Party". Parliamentary History. 30 (s2): 113–130. doi:10.1111/j.1750-0206.2011.00259.x.