Geological Survey (U.S.), North Carolina Geological and Economic Survey, Stephenson, L. W., & Rathbun, M. J. (1923). The Cretaceous formations of North Carolina. Edwards & Broughton Printing Company.
Lua i Stíl Chicago (17ú heag.)Geological Survey (U.S.), North Carolina Geological and Economic Survey, Lloyd William Stephenson, agus Mary J. Rathbun. The Cretaceous Formations of North Carolina. Raleigh [N.C.]: Edwards & Broughton Printing Company, 1923.
Lua MLA (8ú heag.)Geological Survey (U.S.), et al. The Cretaceous Formations of North Carolina. Edwards & Broughton Printing Company, 1923.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.