Cita APA (7th ed.)

Dunwell, F. F. (2008). Hudson: America's river. Columbia University Press.

Cita Chicago (17th ed.)

Dunwell, Frances F. Hudson: America's River. New York: Columbia University Press, 2008.

Cita MLA (9th ed.)

Dunwell, Frances F. Hudson: America's River. Columbia University Press, 2008.