British engineer George Stephenson invented the locomotive and built the first version in
1825.
George Stephenson. (2013). The Biography Channel website. Retrieved 03:47, May 21, 2013, from http://www.biography.com/people/george-stephenson-9493958.
George Stephenson. [Internet]. 2013. The Biography Channel website. Available from: http://www.biography.com/people/george-stephenson-9493958 [Accessed 21 May 2013].
"George Stephenson." 2013. The Biography Channel website. May 21 2013, 03:47 http://www.biography.com/people/george-stephenson-9493958.
"George Stephenson," The Biography Channel website, 2013, http://www.biography.com/people/george-stephenson-9493958 [accessed May 21, 2013].
"George Stephenson," The Biography Channel website, http://www.biography.com/people/george-stephenson-9493958 (accessed May 21, 2013).
George Stephenson [Internet]. The Biography Channel website; 2013 [cited 2013 May 21] Available from: http://www.biography.com/people/george-stephenson-9493958.
George Stephenson, http://www.biography.com/people/george-stephenson-9493958 (last visited May 21, 2013).
George Stephenson. The Biography Channel website. 2013. Available at: http://www.biography.com/people/george-stephenson-9493958. Accessed May 21, 2013.