Sacco and Vanzetti executed. (2013). The History Channel website. Retrieved 11:11, May 21, 2013, from http://www.history.com/this-day-in-history/sacco-and-vanzetti-executed.
Sacco and Vanzetti executed. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/sacco-and-vanzetti-executed [Accessed 21 May 2013].
“Sacco and Vanzetti executed.” 2013. The History Channel website. May 21 2013, 11:11 http://www.history.com/this-day-in-history/sacco-and-vanzetti-executed.
“Sacco and Vanzetti executed,” The History Channel website, 2013, http://www.history.com/this-day-in-history/sacco-and-vanzetti-executed [accessed May 21, 2013].
“Sacco and Vanzetti executed,” The History Channel website, http://www.history.com/this-day-in-history/sacco-and-vanzetti-executed (accessed May 21, 2013).
Sacco and Vanzetti executed [Internet]. The History Channel website; 2013 [cited 2013 May 21] Available from: http://www.history.com/this-day-in-history/sacco-and-vanzetti-executed.
Sacco and Vanzetti executed, http://www.history.com/this-day-in-history/sacco-and-vanzetti-executed (last visited May 21, 2013).
Sacco and Vanzetti executed. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/sacco-and-vanzetti-executed. Accessed May 21, 2013.