Não informado. (1928). Contributions from the Museum of Paleontology. University of Michigan, Museum of Paleontology.
Chicago-Zitierstil (17. Ausg.)Não informado. Contributions from the Museum of Paleontology. Ann Arbor, Mich: University of Michigan, Museum of Paleontology, 1928.
MLA-Zitierstil (8. Ausg.)Não informado. Contributions from the Museum of Paleontology. University of Michigan, Museum of Paleontology, 1928.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.