Rotary engine inventor Felix Wankel born. (2013). The History Channel website. Retrieved 3:06, May 25, 2013, from http://www.history.com/this-day-in-history/rotary-engine-inventor-felix-wankel-born.
Rotary engine inventor Felix Wankel born. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/rotary-engine-inventor-felix-wankel-born [Accessed 25 May 2013].
“Rotary engine inventor Felix Wankel born.” 2013. The History Channel website. May 25 2013, 3:06 http://www.history.com/this-day-in-history/rotary-engine-inventor-felix-wankel-born.
“Rotary engine inventor Felix Wankel born,” The History Channel website, 2013, http://www.history.com/this-day-in-history/rotary-engine-inventor-felix-wankel-born [accessed May 25, 2013].
“Rotary engine inventor Felix Wankel born,” The History Channel website, http://www.history.com/this-day-in-history/rotary-engine-inventor-felix-wankel-born (accessed May 25, 2013).
Rotary engine inventor Felix Wankel born [Internet]. The History Channel website; 2013 [cited 2013 May 25] Available from: http://www.history.com/this-day-in-history/rotary-engine-inventor-felix-wankel-born.
Rotary engine inventor Felix Wankel born, http://www.history.com/this-day-in-history/rotary-engine-inventor-felix-wankel-born (last visited May 25, 2013).
Rotary engine inventor Felix Wankel born. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/rotary-engine-inventor-felix-wankel-born. Accessed May 25, 2013.