Campaign Spot: Laughter (1968). (2013). The History Channel website. Retrieved 7:45, May 21, 2013, from http://www.history.com/videos/campaign-spot-laughter-1968.
Campaign Spot: Laughter (1968). [Internet]. 2013. The History Channel website. Available from: http://www.history.com/videos/campaign-spot-laughter-1968 [Accessed 21 May 2013].
“Campaign Spot: Laughter (1968).” 2013. The History Channel website. May 21 2013, 7:45 http://www.history.com/videos/campaign-spot-laughter-1968.
“Campaign Spot: Laughter (1968),” The History Channel website, 2013, http://www.history.com/videos/campaign-spot-laughter-1968 [accessed May 21, 2013].
“Campaign Spot: Laughter (1968),” The History Channel website, http://www.history.com/videos/campaign-spot-laughter-1968 (accessed May 21, 2013).
Campaign Spot: Laughter (1968) [Internet]. The History Channel website; 2013 [cited 2013 May 21] Available from: http://www.history.com/videos/campaign-spot-laughter-1968.
Campaign Spot: Laughter (1968), http://www.history.com/videos/campaign-spot-laughter-1968 (last visited May 21, 2013).
Campaign Spot: Laughter (1968). The History Channel website. 2013. Available at: http://www.history.com/videos/campaign-spot-laughter-1968. Accessed May 21, 2013.