Levi Strauss and Jacob Davis receive patent for blue jeans. (2013). The History Channel website. Retrieved 1:10, May 21, 2013, from http://www.history.com/this-day-in-history/levi-strauss-and-jacob-davis-receive-patent-for-blue-jeans.
Levi Strauss and Jacob Davis receive patent for blue jeans. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/levi-strauss-and-jacob-davis-receive-patent-for-blue-jeans [Accessed 21 May 2013].
“Levi Strauss and Jacob Davis receive patent for blue jeans.” 2013. The History Channel website. May 21 2013, 1:10 http://www.history.com/this-day-in-history/levi-strauss-and-jacob-davis-receive-patent-for-blue-jeans.
“Levi Strauss and Jacob Davis receive patent for blue jeans,” The History Channel website, 2013, http://www.history.com/this-day-in-history/levi-strauss-and-jacob-davis-receive-patent-for-blue-jeans [accessed May 21, 2013].
“Levi Strauss and Jacob Davis receive patent for blue jeans,” The History Channel website, http://www.history.com/this-day-in-history/levi-strauss-and-jacob-davis-receive-patent-for-blue-jeans (accessed May 21, 2013).
Levi Strauss and Jacob Davis receive patent for blue jeans [Internet]. The History Channel website; 2013 [cited 2013 May 21] Available from: http://www.history.com/this-day-in-history/levi-strauss-and-jacob-davis-receive-patent-for-blue-jeans.
Levi Strauss and Jacob Davis receive patent for blue jeans, http://www.history.com/this-day-in-history/levi-strauss-and-jacob-davis-receive-patent-for-blue-jeans (last visited May 21, 2013).
Levi Strauss and Jacob Davis receive patent for blue jeans. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/levi-strauss-and-jacob-davis-receive-patent-for-blue-jeans. Accessed May 21, 2013.