William Harvey was a 17th-century British physician who became the first to document an understanding of blood circulation.
William Harvey. (2013). The Biography Channel website. Retrieved 11:17, Jun 19, 2013, from http://www.biography.com/people/william-harvey-9330709.
William Harvey. [Internet]. 2013. The Biography Channel website. Available from: http://www.biography.com/people/william-harvey-9330709 [Accessed 19 Jun 2013].
"William Harvey." 2013. The Biography Channel website. Jun 19 2013, 11:17 http://www.biography.com/people/william-harvey-9330709.
"William Harvey," The Biography Channel website, 2013, http://www.biography.com/people/william-harvey-9330709 [accessed Jun 19, 2013].
"William Harvey," The Biography Channel website, http://www.biography.com/people/william-harvey-9330709 (accessed Jun 19, 2013).
William Harvey [Internet]. The Biography Channel website; 2013 [cited 2013 Jun 19] Available from: http://www.biography.com/people/william-harvey-9330709.
William Harvey, http://www.biography.com/people/william-harvey-9330709 (last visited Jun 19, 2013).
William Harvey. The Biography Channel website. 2013. Available at: http://www.biography.com/people/william-harvey-9330709. Accessed Jun 19, 2013.