APA (7th ed.) Zitazioa

Powell, J. W. (1875). Exploration of the Colorado river of the west and its tributaries. Explored in 1869, 1870, 1871, and 1872, under the direction of the secretary of the Smithsonian Institution (1a. ed.). Government Printing Office.

Chicago Style (17th ed.) Zitazioa

Powell, J. W. Exploration of the Colorado River of the West and Its Tributaries. Explored in 1869, 1870, 1871, and 1872, Under the Direction of the Secretary of the Smithsonian Institution. 1a. ed. Washington, D.C: Government Printing Office, 1875.

MLA (9th ed.) Zitazioa

Powell, J. W. Exploration of the Colorado River of the West and Its Tributaries. Explored in 1869, 1870, 1871, and 1872, Under the Direction of the Secretary of the Smithsonian Institution. 1a. ed. Government Printing Office, 1875.