APA (7th ed.) Citation

Geological Survey (U.S.) & ProQuest (Firm). Department of the Interior. United States Geological Survey. George Otis Smith, Director. Professional Paper 81. Cretaceous deposits of the eastern gulf region and species of exogyra from the eastern gulf region and the Carolinas. [publisher not identified].

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and ProQuest (Firm). Department of the Interior. United States Geological Survey. George Otis Smith, Director. Professional Paper 81. Cretaceous Deposits of the Eastern Gulf Region and Species of Exogyra from the Eastern Gulf Region and the Carolinas. Washington: [publisher not identified].

MLA (9th ed.) Citation

Geological Survey (U.S.) and ProQuest (Firm). Department of the Interior. United States Geological Survey. George Otis Smith, Director. Professional Paper 81. Cretaceous Deposits of the Eastern Gulf Region and Species of Exogyra from the Eastern Gulf Region and the Carolinas. [publisher not identified].