Não informado. (1928). Contributions from the Museum of Paleontology. University of Michigan, Museum of Paleontology.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Contributions from the Museum of Paleontology. Ann Arbor, Mich: University of Michigan, Museum of Paleontology, 1928.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Contributions from the Museum of Paleontology. University of Michigan, Museum of Paleontology, 1928.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.