Cita APA (7a ed.)

Williams, H. (1948). The ancient volcanoes of Oregon. Oregon State System of Higher Education.

Cita Chicago Style (17a ed.)

Williams, Howel. The Ancient Volcanoes of Oregon. Eugene: Oregon State System of Higher Education, 1948.

Cita MLA (8a ed.)

Williams, Howel. The Ancient Volcanoes of Oregon. Oregon State System of Higher Education, 1948.

Precaución: Estas citas no son 100% exactas.