APA (7th ed.) Citation

Ellwood, B. B. (1996). Geology and America's national park areas. Prentice Hall.

Chicago Style (17th ed.) Citation

Ellwood, B. B. Geology and America's National Park Areas. Upper Saddle River, N.J.: Prentice Hall, 1996.

MLA (9th ed.) Citation

Ellwood, B. B. Geology and America's National Park Areas. Prentice Hall, 1996.