Preston, R. N. (1972). Historical Oregon: Overland stage routes, old military roads, Indian battle grounds, old forts, old gold mines. Western Guide Pub..
Style de citation Chicago (17e éd.)Preston, Ralph N. Historical Oregon: Overland Stage Routes, Old Military Roads, Indian Battle Grounds, Old Forts, Old Gold Mines. Corvallis, Or.: Western Guide Pub., 1972.
Style de citation MLA (8e éd.)Preston, Ralph N. Historical Oregon: Overland Stage Routes, Old Military Roads, Indian Battle Grounds, Old Forts, Old Gold Mines. Western Guide Pub., 1972.
Attention : ces citations peuvent ne pas être correctes à 100%.