Special Advertiser Section: Porsche - Engineered for Magic. (2013). The History Channel website. Retrieved 1:51, May 26, 2013, from http://www.history.com/shows/101-gadgets-that-changed-the-world/interactives/porsche-engineered-for-magic.
Special Advertiser Section: Porsche - Engineered for Magic. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/shows/101-gadgets-that-changed-the-world/interactives/porsche-engineered-for-magic [Accessed 26 May 2013].
“Special Advertiser Section: Porsche - Engineered for Magic.” 2013. The History Channel website. May 26 2013, 1:51 http://www.history.com/shows/101-gadgets-that-changed-the-world/interactives/porsche-engineered-for-magic.
“Special Advertiser Section: Porsche - Engineered for Magic,” The History Channel website, 2013, http://www.history.com/shows/101-gadgets-that-changed-the-world/interactives/porsche-engineered-for-magic [accessed May 26, 2013].
“Special Advertiser Section: Porsche - Engineered for Magic,” The History Channel website, http://www.history.com/shows/101-gadgets-that-changed-the-world/interactives/porsche-engineered-for-magic (accessed May 26, 2013).
Special Advertiser Section: Porsche - Engineered for Magic [Internet]. The History Channel website; 2013 [cited 2013 May 26] Available from: http://www.history.com/shows/101-gadgets-that-changed-the-world/interactives/porsche-engineered-for-magic.
Special Advertiser Section: Porsche - Engineered for Magic, http://www.history.com/shows/101-gadgets-that-changed-the-world/interactives/porsche-engineered-for-magic (last visited May 26, 2013).
Special Advertiser Section: Porsche - Engineered for Magic. The History Channel website. 2013. Available at: http://www.history.com/shows/101-gadgets-that-changed-the-world/interactives/porsche-engineered-for-magic. Accessed May 26, 2013.