APA (7th ed.) Citation

Hill, T. P., Werner, M. A., & Horton, M. J. (1967). Chemical composition of sedimentary rocks in Colorado, Kansas, Montana, Nebraska, North Dakota, South Dakota, and Wyoming. U.S. Govt. Print. Off.

Chicago Style (17th ed.) Citation

Hill, Thelma P., Marian A. Werner, and M. Julia Horton. Chemical Composition of Sedimentary Rocks in Colorado, Kansas, Montana, Nebraska, North Dakota, South Dakota, and Wyoming. Washington: U.S. Govt. Print. Off, 1967.

MLA (9th ed.) Citation

Hill, Thelma P., et al. Chemical Composition of Sedimentary Rocks in Colorado, Kansas, Montana, Nebraska, North Dakota, South Dakota, and Wyoming. U.S. Govt. Print. Off, 1967.