Gass, P. (1958). A journal of the voyages and travels of a corps of discovery: Under the command of Capt. Lewis and Capt. Clark of the Army of the United States, from the mouth of the River Missouri through the interior parts of North America to the Pacific Ocean, during the years 1804, 1805 and 1806. Ross and Haines.
Cita Chicago Style (17a ed.)Gass, Patrick. A Journal of the Voyages and Travels of a Corps of Discovery: Under the Command of Capt. Lewis and Capt. Clark of the Army of the United States, from the Mouth of the River Missouri Through the Interior Parts of North America to the Pacific Ocean, During the Years 1804, 1805 and 1806. Minneapolis: Ross and Haines, 1958.
Cita MLA (8a ed.)Gass, Patrick. A Journal of the Voyages and Travels of a Corps of Discovery: Under the Command of Capt. Lewis and Capt. Clark of the Army of the United States, from the Mouth of the River Missouri Through the Interior Parts of North America to the Pacific Ocean, During the Years 1804, 1805 and 1806. Ross and Haines, 1958.