Southern Italy rocked by earthquake. (2013). The History Channel website. Retrieved 6:37, May 22, 2013, from http://www.history.com/this-day-in-history/southern-italy-rocked-by-earthquake.
Southern Italy rocked by earthquake. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/southern-italy-rocked-by-earthquake [Accessed 22 May 2013].
“Southern Italy rocked by earthquake.” 2013. The History Channel website. May 22 2013, 6:37 http://www.history.com/this-day-in-history/southern-italy-rocked-by-earthquake.
“Southern Italy rocked by earthquake,” The History Channel website, 2013, http://www.history.com/this-day-in-history/southern-italy-rocked-by-earthquake [accessed May 22, 2013].
“Southern Italy rocked by earthquake,” The History Channel website, http://www.history.com/this-day-in-history/southern-italy-rocked-by-earthquake (accessed May 22, 2013).
Southern Italy rocked by earthquake [Internet]. The History Channel website; 2013 [cited 2013 May 22] Available from: http://www.history.com/this-day-in-history/southern-italy-rocked-by-earthquake.
Southern Italy rocked by earthquake, http://www.history.com/this-day-in-history/southern-italy-rocked-by-earthquake (last visited May 22, 2013).
Southern Italy rocked by earthquake. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/southern-italy-rocked-by-earthquake. Accessed May 22, 2013.