Zimmerwald Conference issues a call for immediate peace. (2013). The History Channel website. Retrieved 3:14, May 25, 2013, from http://www.history.com/this-day-in-history/zimmerwald-conference-issues-a-call-for-immediate-peace.
Zimmerwald Conference issues a call for immediate peace. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/zimmerwald-conference-issues-a-call-for-immediate-peace [Accessed 25 May 2013].
“Zimmerwald Conference issues a call for immediate peace.” 2013. The History Channel website. May 25 2013, 3:14 http://www.history.com/this-day-in-history/zimmerwald-conference-issues-a-call-for-immediate-peace.
“Zimmerwald Conference issues a call for immediate peace,” The History Channel website, 2013, http://www.history.com/this-day-in-history/zimmerwald-conference-issues-a-call-for-immediate-peace [accessed May 25, 2013].
“Zimmerwald Conference issues a call for immediate peace,” The History Channel website, http://www.history.com/this-day-in-history/zimmerwald-conference-issues-a-call-for-immediate-peace (accessed May 25, 2013).
Zimmerwald Conference issues a call for immediate peace [Internet]. The History Channel website; 2013 [cited 2013 May 25] Available from: http://www.history.com/this-day-in-history/zimmerwald-conference-issues-a-call-for-immediate-peace.
Zimmerwald Conference issues a call for immediate peace, http://www.history.com/this-day-in-history/zimmerwald-conference-issues-a-call-for-immediate-peace (last visited May 25, 2013).
Zimmerwald Conference issues a call for immediate peace. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/zimmerwald-conference-issues-a-call-for-immediate-peace. Accessed May 25, 2013.