William IV was king of Great Britain and Ireland and king of Hanover in the early 19th century.
William IV. (2013). The Biography Channel website. Retrieved 04:52, Jun 19, 2013, from http://www.biography.com/people/william-iv-9532016.
William IV. [Internet]. 2013. The Biography Channel website. Available from: http://www.biography.com/people/william-iv-9532016 [Accessed 19 Jun 2013].
"William IV." 2013. The Biography Channel website. Jun 19 2013, 04:52 http://www.biography.com/people/william-iv-9532016.
"William IV," The Biography Channel website, 2013, http://www.biography.com/people/william-iv-9532016 [accessed Jun 19, 2013].
"William IV," The Biography Channel website, http://www.biography.com/people/william-iv-9532016 (accessed Jun 19, 2013).
William IV [Internet]. The Biography Channel website; 2013 [cited 2013 Jun 19] Available from: http://www.biography.com/people/william-iv-9532016.
William IV, http://www.biography.com/people/william-iv-9532016 (last visited Jun 19, 2013).
William IV. The Biography Channel website. 2013. Available at: http://www.biography.com/people/william-iv-9532016. Accessed Jun 19, 2013.