APA (7th ed.) Citation

Duncan, D. C. (1974). Four newly named tongues of Eocene Green River Formation, northern Piceance Creek basin, Colorado. U.S. Govt. Print. Off.

Chicago Style (17th ed.) Citation

Duncan, Donald C. Four Newly Named Tongues of Eocene Green River Formation, Northern Piceance Creek Basin, Colorado. Washington: U.S. Govt. Print. Off, 1974.

MLA (9th ed.) Citation

Duncan, Donald C. Four Newly Named Tongues of Eocene Green River Formation, Northern Piceance Creek Basin, Colorado. U.S. Govt. Print. Off, 1974.