Danica Patrick becomes first woman to lead Indy 500. (2013). The History Channel website. Retrieved 10:36, May 21, 2013, from http://www.history.com/this-day-in-history/danica-patrick-becomes-first-woman-to-lead-indy-500.
Danica Patrick becomes first woman to lead Indy 500. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/danica-patrick-becomes-first-woman-to-lead-indy-500 [Accessed 21 May 2013].
“Danica Patrick becomes first woman to lead Indy 500.” 2013. The History Channel website. May 21 2013, 10:36 http://www.history.com/this-day-in-history/danica-patrick-becomes-first-woman-to-lead-indy-500.
“Danica Patrick becomes first woman to lead Indy 500,” The History Channel website, 2013, http://www.history.com/this-day-in-history/danica-patrick-becomes-first-woman-to-lead-indy-500 [accessed May 21, 2013].
“Danica Patrick becomes first woman to lead Indy 500,” The History Channel website, http://www.history.com/this-day-in-history/danica-patrick-becomes-first-woman-to-lead-indy-500 (accessed May 21, 2013).
Danica Patrick becomes first woman to lead Indy 500 [Internet]. The History Channel website; 2013 [cited 2013 May 21] Available from: http://www.history.com/this-day-in-history/danica-patrick-becomes-first-woman-to-lead-indy-500.
Danica Patrick becomes first woman to lead Indy 500, http://www.history.com/this-day-in-history/danica-patrick-becomes-first-woman-to-lead-indy-500 (last visited May 21, 2013).
Danica Patrick becomes first woman to lead Indy 500. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/danica-patrick-becomes-first-woman-to-lead-indy-500. Accessed May 21, 2013.