Ruby, R. H., & Brown, J. A. (1974). Ferryboats on the Columbia River, including the bridges and dams. Superior Pub. Co..
Cita Chicago Style (17a ed.)Ruby, Robert H., y John A. Brown. Ferryboats on the Columbia River, Including the Bridges and Dams. Seattle: Superior Pub. Co., 1974.
Cita MLA (8a ed.)Ruby, Robert H., y John A. Brown. Ferryboats on the Columbia River, Including the Bridges and Dams. Superior Pub. Co., 1974.
Precaución: Estas citas no son 100% exactas.