(1989). Cretaceous and Tertiary stratigraphy of the Elk Neck area, Northeastern Maryland: Elk Neck State Park, Maryland, July 12, 1989. American Geophysical Union.
Chicago-Zitierstil (17. Ausg.)Cretaceous and Tertiary Stratigraphy of the Elk Neck Area, Northeastern Maryland: Elk Neck State Park, Maryland, July 12, 1989. Washington, DC: American Geophysical Union, 1989.
MLA-Zitierstil (9. Ausg.)Cretaceous and Tertiary Stratigraphy of the Elk Neck Area, Northeastern Maryland: Elk Neck State Park, Maryland, July 12, 1989. American Geophysical Union, 1989.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.