Cita APA (7th ed.)

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.

Cita Chicago (17th ed.)

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.

Cita MLA (9th ed.)

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.