"Stephen Amell Talks ARROW, How He Won the Role, the Evolution of the Queen Family Dynamic, Appearances by Other DC Characters, and More". Interview with Christina Radish, collider.com. October 8, 2012.
Meriwether Lewis, William Clark (1842). “History of the Expedition Under the Command of Captains Lewis and Clarke, to the Sources of the Missouri: Thence Across the Rockey Mountains, and Down the River Columbia to the Pacific Ocean ; Performed During the Years 1804, 1805, 1806, by Order of the Government of the United States”, p.143