APA (7th ed.) Citation

Dolnick, E. (2003). Down the great unknown: The conquest of the Grand Canyon. HarperCollins Publishers.

Chicago Style (17th ed.) Citation

Dolnick, Edward. Down the Great Unknown: The Conquest of the Grand Canyon. London: HarperCollins Publishers, 2003.

MLA (9th ed.) Citation

Dolnick, Edward. Down the Great Unknown: The Conquest of the Grand Canyon. HarperCollins Publishers, 2003.