Springer, F. (1921). The fossil crinoid genus Dolatocrinus and its allies. Government Printing Office.
Chicago-Zitierstil (17. Ausg.)Springer, Frank. The Fossil Crinoid Genus Dolatocrinus and Its Allies. Washington: Government Printing Office, 1921.
MLA-Zitierstil (9. Ausg.)Springer, Frank. The Fossil Crinoid Genus Dolatocrinus and Its Allies. Government Printing Office, 1921.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.