Harding becomes first president to be heard on the radio. (2013). The History Channel website. Retrieved 2:35, June 19, 2013, from http://www.history.com/this-day-in-history/harding-becomes-first-president-to-be-heard-on-the-radio.
Harding becomes first president to be heard on the radio. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/harding-becomes-first-president-to-be-heard-on-the-radio [Accessed 19 Jun 2013].
“Harding becomes first president to be heard on the radio.” 2013. The History Channel website. Jun 19 2013, 2:35 http://www.history.com/this-day-in-history/harding-becomes-first-president-to-be-heard-on-the-radio.
“Harding becomes first president to be heard on the radio,” The History Channel website, 2013, http://www.history.com/this-day-in-history/harding-becomes-first-president-to-be-heard-on-the-radio [accessed Jun 19, 2013].
“Harding becomes first president to be heard on the radio,” The History Channel website, http://www.history.com/this-day-in-history/harding-becomes-first-president-to-be-heard-on-the-radio (accessed Jun 19, 2013).
Harding becomes first president to be heard on the radio [Internet]. The History Channel website; 2013 [cited 2013 Jun 19] Available from: http://www.history.com/this-day-in-history/harding-becomes-first-president-to-be-heard-on-the-radio.
Harding becomes first president to be heard on the radio, http://www.history.com/this-day-in-history/harding-becomes-first-president-to-be-heard-on-the-radio (last visited Jun 19, 2013).
Harding becomes first president to be heard on the radio. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/harding-becomes-first-president-to-be-heard-on-the-radio. Accessed Jun 19, 2013.