APA (7th ed.) Citation

Thoreau, H. D., & Howarth, W. L. (1982). Thoreau in the mountains. Farrar, Straus, Giroux.

Chicago Style (17th ed.) Citation

Thoreau, Henry David, and William L. Howarth. Thoreau in the Mountains. New York: Farrar, Straus, Giroux, 1982.

MLA (9th ed.) Citation

Thoreau, Henry David, and William L. Howarth. Thoreau in the Mountains. Farrar, Straus, Giroux, 1982.