Cita APA (7a ed.)

Smith, G. O., & Willis, B. (1903). Contributions to the geology of Washington: Geology and physiography of central Washington. Govt. print. off..

Cita Chicago Style (17a ed.)

Smith, George Otis, y Bailey Willis. Contributions to the Geology of Washington: Geology and Physiography of Central Washington. Washington: Govt. print. off., 1903.

Cita MLA (8a ed.)

Smith, George Otis, y Bailey Willis. Contributions to the Geology of Washington: Geology and Physiography of Central Washington. Govt. print. off., 1903.

Precaución: Estas citas no son 100% exactas.