Sir William Robertson is appointed chief of the Imperial General Staff. (2013). The History Channel website. Retrieved 3:31, May 24, 2013, from http://www.history.com/this-day-in-history/sir-william-robertson-is-appointed-chief-of-the-imperial-general-staff.
Sir William Robertson is appointed chief of the Imperial General Staff. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/sir-william-robertson-is-appointed-chief-of-the-imperial-general-staff [Accessed 24 May 2013].
“Sir William Robertson is appointed chief of the Imperial General Staff.” 2013. The History Channel website. May 24 2013, 3:31 http://www.history.com/this-day-in-history/sir-william-robertson-is-appointed-chief-of-the-imperial-general-staff.
“Sir William Robertson is appointed chief of the Imperial General Staff,” The History Channel website, 2013, http://www.history.com/this-day-in-history/sir-william-robertson-is-appointed-chief-of-the-imperial-general-staff [accessed May 24, 2013].
“Sir William Robertson is appointed chief of the Imperial General Staff,” The History Channel website, http://www.history.com/this-day-in-history/sir-william-robertson-is-appointed-chief-of-the-imperial-general-staff (accessed May 24, 2013).
Sir William Robertson is appointed chief of the Imperial General Staff [Internet]. The History Channel website; 2013 [cited 2013 May 24] Available from: http://www.history.com/this-day-in-history/sir-william-robertson-is-appointed-chief-of-the-imperial-general-staff.
Sir William Robertson is appointed chief of the Imperial General Staff, http://www.history.com/this-day-in-history/sir-william-robertson-is-appointed-chief-of-the-imperial-general-staff (last visited May 24, 2013).
Sir William Robertson is appointed chief of the Imperial General Staff. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/sir-william-robertson-is-appointed-chief-of-the-imperial-general-staff. Accessed May 24, 2013.