Mac Davis earns one of the 1970s' most head-scratching . (2013). The History Channel website. Retrieved 5:11, May 20, 2013, from http://www.history.com/.
Mac Davis earns one of the 1970s' most head-scratching . [Internet]. 2013. The History Channel website. Available from: http://www.history.com/ [Accessed 20 May 2013].
“Mac Davis earns one of the 1970s' most head-scratching .” 2013. The History Channel website. May 20 2013, 5:11 http://www.history.com/.
“Mac Davis earns one of the 1970s' most head-scratching ,” The History Channel website, 2013, http://www.history.com/ [accessed May 20, 2013].
“Mac Davis earns one of the 1970s' most head-scratching ,” The History Channel website, http://www.history.com/ (accessed May 20, 2013).
Mac Davis earns one of the 1970s' most head-scratching [Internet]. The History Channel website; 2013 [cited 2013 May 20] Available from: http://www.history.com/.
Mac Davis earns one of the 1970s' most head-scratching , http://www.history.com/ (last visited May 20, 2013).
Mac Davis earns one of the 1970s' most head-scratching . The History Channel website. 2013. Available at: http://www.history.com/. Accessed May 20, 2013.