San Francisco firefighters halt massive blaze. (2013). The History Channel website. Retrieved 6:45, May 23, 2013, from http://www.history.com/this-day-in-history/san-francisco-firefighters-halt-massive-blaze.
San Francisco firefighters halt massive blaze. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/san-francisco-firefighters-halt-massive-blaze [Accessed 23 May 2013].
“San Francisco firefighters halt massive blaze.” 2013. The History Channel website. May 23 2013, 6:45 http://www.history.com/this-day-in-history/san-francisco-firefighters-halt-massive-blaze.
“San Francisco firefighters halt massive blaze,” The History Channel website, 2013, http://www.history.com/this-day-in-history/san-francisco-firefighters-halt-massive-blaze [accessed May 23, 2013].
“San Francisco firefighters halt massive blaze,” The History Channel website, http://www.history.com/this-day-in-history/san-francisco-firefighters-halt-massive-blaze (accessed May 23, 2013).
San Francisco firefighters halt massive blaze [Internet]. The History Channel website; 2013 [cited 2013 May 23] Available from: http://www.history.com/this-day-in-history/san-francisco-firefighters-halt-massive-blaze.
San Francisco firefighters halt massive blaze, http://www.history.com/this-day-in-history/san-francisco-firefighters-halt-massive-blaze (last visited May 23, 2013).
San Francisco firefighters halt massive blaze. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/san-francisco-firefighters-halt-massive-blaze. Accessed May 23, 2013.