APA (7th ed.) Citation

Cobban, W., & Kennedy, W. (1991). Some Upper Cretaceous ammonites from the Nacatoch Sand of Hempstead County, Arkansas.

Chicago Style (17th ed.) Citation

Cobban, W., and W. Kennedy. Some Upper Cretaceous Ammonites from the Nacatoch Sand of Hempstead County, Arkansas. 1991.

MLA (9th ed.) Citation

Cobban, W., and W. Kennedy. Some Upper Cretaceous Ammonites from the Nacatoch Sand of Hempstead County, Arkansas. 1991.

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