Albert Einstein born. (2013). The History Channel website. Retrieved 9:15, May 22, 2013, from http://www.history.com/this-day-in-history/albert-einstein-born.
Albert Einstein born. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/albert-einstein-born [Accessed 22 May 2013].
“Albert Einstein born.” 2013. The History Channel website. May 22 2013, 9:15 http://www.history.com/this-day-in-history/albert-einstein-born.
“Albert Einstein born,” The History Channel website, 2013, http://www.history.com/this-day-in-history/albert-einstein-born [accessed May 22, 2013].
“Albert Einstein born,” The History Channel website, http://www.history.com/this-day-in-history/albert-einstein-born (accessed May 22, 2013).
Albert Einstein born [Internet]. The History Channel website; 2013 [cited 2013 May 22] Available from: http://www.history.com/this-day-in-history/albert-einstein-born.
Albert Einstein born, http://www.history.com/this-day-in-history/albert-einstein-born (last visited May 22, 2013).
Albert Einstein born. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/albert-einstein-born. Accessed May 22, 2013.