APA (7th ed.) Citation

Geological Survey (U.S.). Changes in stratigraphic nomenclature by the U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). Changes in Stratigraphic Nomenclature by the U.S. Geological Survey.

MLA (9th ed.) Citation

Geological Survey (U.S.). Changes in Stratigraphic Nomenclature by the U.S. Geological Survey.

Warning: These citations may not always be 100% accurate.