Cita APA (7a ed.)

Cope, E. (1875). The Vertebrata of the Cretaceous Formations of the West. Department of the Interior. U.S.Geological Survey.

Cita Chicago Style (17a ed.)

Cope, E.D. The Vertebrata of the Cretaceous Formations of the West. wahington: Department of the Interior. U.S.Geological Survey, 1875.

Cita MLA (9a ed.)

Cope, E.D. The Vertebrata of the Cretaceous Formations of the West. Department of the Interior. U.S.Geological Survey, 1875.