APA (7th ed.) Citation

Wrucke, C. T. (1974). The Whitehorn granodiorite of the Arkansas Valley in central Colorado. U.S. Gov. Print. Off.

Chicago Style (17th ed.) Citation

Wrucke, Chester T. The Whitehorn Granodiorite of the Arkansas Valley in Central Colorado. Washington: U.S. Gov. Print. Off, 1974.

MLA (9th ed.) Citation

Wrucke, Chester T. The Whitehorn Granodiorite of the Arkansas Valley in Central Colorado. U.S. Gov. Print. Off, 1974.