Since you did not indicate where you found the item, I went ahead and located it on the Archives of the Episcopal Church website. To cite this copy, follow this general format:
Author, A. A., & Author, B. B. (Date of publication). Title of document. Retrieved from http://Web address
Therefore, your citation would look like this:
The Archives of the Episcopal Church (ed.). (2009). Constitution & canons together with the rules of order for the government of the Protestant Episcopal Church in the United States of America otherwise known as the Episcopal Church. Retrieved from http://www.episcopalarchives.org/CandC_2009.pdf
