Insulin isolated in Toronto. (2013). The History Channel website. Retrieved 12:28, May 25, 2013, from http://www.history.com/this-day-in-history/insulin-isolated-in-toronto.
Insulin isolated in Toronto. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/insulin-isolated-in-toronto [Accessed 25 May 2013].
“Insulin isolated in Toronto.” 2013. The History Channel website. May 25 2013, 12:28 http://www.history.com/this-day-in-history/insulin-isolated-in-toronto.
“Insulin isolated in Toronto,” The History Channel website, 2013, http://www.history.com/this-day-in-history/insulin-isolated-in-toronto [accessed May 25, 2013].
“Insulin isolated in Toronto,” The History Channel website, http://www.history.com/this-day-in-history/insulin-isolated-in-toronto (accessed May 25, 2013).
Insulin isolated in Toronto [Internet]. The History Channel website; 2013 [cited 2013 May 25] Available from: http://www.history.com/this-day-in-history/insulin-isolated-in-toronto.
Insulin isolated in Toronto, http://www.history.com/this-day-in-history/insulin-isolated-in-toronto (last visited May 25, 2013).
Insulin isolated in Toronto. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/insulin-isolated-in-toronto. Accessed May 25, 2013.