Calkins, F. C. (1905). Geology and water resources of a portion of east-central Washington. U.S. Geological Survey.
Cita Chicago Style (17a ed.)Calkins, Frank C. Geology and Water Resources of a Portion of East-central Washington. Washington, D.C.: U.S. Geological Survey, 1905.
Cita MLA (8a ed.)Calkins, Frank C. Geology and Water Resources of a Portion of East-central Washington. U.S. Geological Survey, 1905.
Precaución: Estas citas no son 100% exactas.