Lewis and Clark promote Patrick Gass to sergeant. (2013). The History Channel website. Retrieved 5:56, May 22, 2013, from http://www.history.com/this-day-in-history/lewis-and-clark-promote-patrick-gass-to-sergeant.
Lewis and Clark promote Patrick Gass to sergeant. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/lewis-and-clark-promote-patrick-gass-to-sergeant [Accessed 22 May 2013].
“Lewis and Clark promote Patrick Gass to sergeant.” 2013. The History Channel website. May 22 2013, 5:56 http://www.history.com/this-day-in-history/lewis-and-clark-promote-patrick-gass-to-sergeant.
“Lewis and Clark promote Patrick Gass to sergeant,” The History Channel website, 2013, http://www.history.com/this-day-in-history/lewis-and-clark-promote-patrick-gass-to-sergeant [accessed May 22, 2013].
“Lewis and Clark promote Patrick Gass to sergeant,” The History Channel website, http://www.history.com/this-day-in-history/lewis-and-clark-promote-patrick-gass-to-sergeant (accessed May 22, 2013).
Lewis and Clark promote Patrick Gass to sergeant [Internet]. The History Channel website; 2013 [cited 2013 May 22] Available from: http://www.history.com/this-day-in-history/lewis-and-clark-promote-patrick-gass-to-sergeant.
Lewis and Clark promote Patrick Gass to sergeant, http://www.history.com/this-day-in-history/lewis-and-clark-promote-patrick-gass-to-sergeant (last visited May 22, 2013).
Lewis and Clark promote Patrick Gass to sergeant. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/lewis-and-clark-promote-patrick-gass-to-sergeant. Accessed May 22, 2013.