Romanov family executed. (2013). The History Channel website. Retrieved 10:34, May 20, 2013, from http://www.history.com/this-day-in-history/romanov-family-executed.
Romanov family executed. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/romanov-family-executed [Accessed 20 May 2013].
“Romanov family executed.” 2013. The History Channel website. May 20 2013, 10:34 http://www.history.com/this-day-in-history/romanov-family-executed.
“Romanov family executed,” The History Channel website, 2013, http://www.history.com/this-day-in-history/romanov-family-executed [accessed May 20, 2013].
“Romanov family executed,” The History Channel website, http://www.history.com/this-day-in-history/romanov-family-executed (accessed May 20, 2013).
Romanov family executed [Internet]. The History Channel website; 2013 [cited 2013 May 20] Available from: http://www.history.com/this-day-in-history/romanov-family-executed.
Romanov family executed, http://www.history.com/this-day-in-history/romanov-family-executed (last visited May 20, 2013).
Romanov family executed. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/romanov-family-executed. Accessed May 20, 2013.