Herbert Hoover dedicates Empire State Building. (2013). The History Channel website. Retrieved 10:46, June 18, 2013, from http://www.history.com/this-day-in-history/herbert-hoover-dedicates-empire-state-building.
Herbert Hoover dedicates Empire State Building. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/herbert-hoover-dedicates-empire-state-building [Accessed 18 Jun 2013].
“Herbert Hoover dedicates Empire State Building.” 2013. The History Channel website. Jun 18 2013, 10:46 http://www.history.com/this-day-in-history/herbert-hoover-dedicates-empire-state-building.
“Herbert Hoover dedicates Empire State Building,” The History Channel website, 2013, http://www.history.com/this-day-in-history/herbert-hoover-dedicates-empire-state-building [accessed Jun 18, 2013].
“Herbert Hoover dedicates Empire State Building,” The History Channel website, http://www.history.com/this-day-in-history/herbert-hoover-dedicates-empire-state-building (accessed Jun 18, 2013).
Herbert Hoover dedicates Empire State Building [Internet]. The History Channel website; 2013 [cited 2013 Jun 18] Available from: http://www.history.com/this-day-in-history/herbert-hoover-dedicates-empire-state-building.
Herbert Hoover dedicates Empire State Building, http://www.history.com/this-day-in-history/herbert-hoover-dedicates-empire-state-building (last visited Jun 18, 2013).
Herbert Hoover dedicates Empire State Building. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/herbert-hoover-dedicates-empire-state-building. Accessed Jun 18, 2013.