APA (7th ed.) Citation

Ehlers, G. M. (1973). Stratigraphy of the Niagaran series of the Northern Peninsula of Michigan. Museum of Paleontology.

Chicago Style (17th ed.) Citation

Ehlers, George Marion. Stratigraphy of the Niagaran Series of the Northern Peninsula of Michigan. Ann Arbor: Museum of Paleontology, 1973.

MLA (9th ed.) Citation

Ehlers, George Marion. Stratigraphy of the Niagaran Series of the Northern Peninsula of Michigan. Museum of Paleontology, 1973.