Citazione Stile APA (7a Edizione)

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.

Citazione stile Chigago Style (17a edizione)

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.

Citatione MLA (9a 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.