Cita APA (7a ed.)

Williams, J. H. (1912). The guardians of the Columbia: Mount Hood, Mount Adams and Mount St. Helens. J. H. Williams.

Cita Chicago Style (17a ed.)

Williams, John H. The Guardians of the Columbia: Mount Hood, Mount Adams and Mount St. Helens. Tacoma: J. H. Williams, 1912.

Cita MLA (8a ed.)

Williams, John H. The Guardians of the Columbia: Mount Hood, Mount Adams and Mount St. Helens. J. H. Williams, 1912.

Precaución: Estas citas no son 100% exactas.