Red Baron killed in action. (2013). The History Channel website. Retrieved 2:59, May 24, 2013, from http://www.history.com/this-day-in-history/red-baron-killed-in-action.
Red Baron killed in action. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/red-baron-killed-in-action [Accessed 24 May 2013].
“Red Baron killed in action.” 2013. The History Channel website. May 24 2013, 2:59 http://www.history.com/this-day-in-history/red-baron-killed-in-action.
“Red Baron killed in action,” The History Channel website, 2013, http://www.history.com/this-day-in-history/red-baron-killed-in-action [accessed May 24, 2013].
“Red Baron killed in action,” The History Channel website, http://www.history.com/this-day-in-history/red-baron-killed-in-action (accessed May 24, 2013).
Red Baron killed in action [Internet]. The History Channel website; 2013 [cited 2013 May 24] Available from: http://www.history.com/this-day-in-history/red-baron-killed-in-action.
Red Baron killed in action, http://www.history.com/this-day-in-history/red-baron-killed-in-action (last visited May 24, 2013).
Red Baron killed in action. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/red-baron-killed-in-action. Accessed May 24, 2013.