APA (7th ed.) Citation

Geological Survey (U.S.). Geologic Names Committee & Association of American State Geologists. (2018). Divisions of geologic time: Major chronostratigraphic and geochronologic units. U.S. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). Geologic Names Committee and Association of American State Geologists. Divisions of Geologic Time: Major Chronostratigraphic and Geochronologic Units. [Reston, Virginia]: U.S. Department of the Interior, U.S. Geological Survey, 2018.

MLA (9th ed.) Citation

Geological Survey (U.S.). Geologic Names Committee and Association of American State Geologists. Divisions of Geologic Time: Major Chronostratigraphic and Geochronologic Units. U.S. Department of the Interior, U.S. Geological Survey, 2018.