APA (7th ed.) Citation

Hill, R. T., & Vaughan, T. W. (1898). The lower Cretaceous Gryphæas of the Texas region. Department of the Interior, United States Geological Survey.

Chicago Style (17th ed.) Citation

Hill, Robert Thomas, and Thomas Wayland Vaughan. The Lower Cretaceous Gryphæas of the Texas Region. Washington, D.C.: Department of the Interior, United States Geological Survey, 1898.

MLA (9th ed.) Citation

Hill, Robert Thomas, and Thomas Wayland Vaughan. The Lower Cretaceous Gryphæas of the Texas Region. Department of the Interior, United States Geological Survey, 1898.