Nixon signs legislation banning cigarette ads on TV and radio. (2013). The History Channel website. Retrieved 6:43, May 18, 2013, from http://www.history.com/this-day-in-history/nixon-signs-legislation-banning-cigarette-ads-on-tv-and-radio.
Nixon signs legislation banning cigarette ads on TV and radio. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/nixon-signs-legislation-banning-cigarette-ads-on-tv-and-radio [Accessed 18 May 2013].
“Nixon signs legislation banning cigarette ads on TV and radio.” 2013. The History Channel website. May 18 2013, 6:43 http://www.history.com/this-day-in-history/nixon-signs-legislation-banning-cigarette-ads-on-tv-and-radio.
“Nixon signs legislation banning cigarette ads on TV and radio,” The History Channel website, 2013, http://www.history.com/this-day-in-history/nixon-signs-legislation-banning-cigarette-ads-on-tv-and-radio [accessed May 18, 2013].
“Nixon signs legislation banning cigarette ads on TV and radio,” The History Channel website, http://www.history.com/this-day-in-history/nixon-signs-legislation-banning-cigarette-ads-on-tv-and-radio (accessed May 18, 2013).
Nixon signs legislation banning cigarette ads on TV and radio [Internet]. The History Channel website; 2013 [cited 2013 May 18] Available from: http://www.history.com/this-day-in-history/nixon-signs-legislation-banning-cigarette-ads-on-tv-and-radio.
Nixon signs legislation banning cigarette ads on TV and radio, http://www.history.com/this-day-in-history/nixon-signs-legislation-banning-cigarette-ads-on-tv-and-radio (last visited May 18, 2013).
Nixon signs legislation banning cigarette ads on TV and radio. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/nixon-signs-legislation-banning-cigarette-ads-on-tv-and-radio. Accessed May 18, 2013.