APA (7th ed.) Citation

Hatcher, J. B., Lull, R. S., Osborn, H. F., & Marsh, O. C. (1907). The Ceratopsia. Govt. Print. Off.

Chicago Style (17th ed.) Citation

Hatcher, J. B., Richard Swann Lull, Henry Fairfield Osborn, and Othniel Charles Marsh. The Ceratopsia. Washington: Govt. Print. Off, 1907.

MLA (9th ed.) Citation

Hatcher, J. B., et al. The Ceratopsia. Govt. Print. Off, 1907.