United States widens aerial campaign. (2013). The History Channel website. Retrieved 9:43, May 23, 2013, from http://www.history.com/this-day-in-history/united-states-widens-aerial-campaign.
United States widens aerial campaign. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/united-states-widens-aerial-campaign [Accessed 23 May 2013].
“United States widens aerial campaign.” 2013. The History Channel website. May 23 2013, 9:43 http://www.history.com/this-day-in-history/united-states-widens-aerial-campaign.
“United States widens aerial campaign,” The History Channel website, 2013, http://www.history.com/this-day-in-history/united-states-widens-aerial-campaign [accessed May 23, 2013].
“United States widens aerial campaign,” The History Channel website, http://www.history.com/this-day-in-history/united-states-widens-aerial-campaign (accessed May 23, 2013).
United States widens aerial campaign [Internet]. The History Channel website; 2013 [cited 2013 May 23] Available from: http://www.history.com/this-day-in-history/united-states-widens-aerial-campaign.
United States widens aerial campaign, http://www.history.com/this-day-in-history/united-states-widens-aerial-campaign (last visited May 23, 2013).
United States widens aerial campaign. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/united-states-widens-aerial-campaign. Accessed May 23, 2013.