Não informado. (1927). Journal of Paleontology. Society of Economic Paleontologists and Mineralogists.
Chicago-Zitierstil (17. Ausg.)Não informado. Journal of Paleontology. Tulsa, Okla: Society of Economic Paleontologists and Mineralogists, 1927.
MLA-Zitierstil (8. Ausg.)Não informado. Journal of Paleontology. Society of Economic Paleontologists and Mineralogists, 1927.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.