Não informado. (1924). Contributions from the Museum of Geology of the University of Michigan. University of Michigan, Museum of Geology.
Chicago-Zitierstil (17. Ausg.)Não informado. Contributions from the Museum of Geology of the University of Michigan. Ann Arbor, Mich: University of Michigan, Museum of Geology, 1924.
MLA-Zitierstil (8. Ausg.)Não informado. Contributions from the Museum of Geology of the University of Michigan. University of Michigan, Museum of Geology, 1924.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.