APA (7th ed.) Citation

Over, W. H., & Churchill, E. P. (1927). A preliminary report of a biological survey of the lakes of South Dakota. [publisher not identified].

Chicago Style (17th ed.) Citation

Over, William Henry, and E. P. Churchill. A Preliminary Report of a Biological Survey of the Lakes of South Dakota. Vermillion, S.D.: [publisher not identified], 1927.

MLA (9th ed.) Citation

Over, William Henry, and E. P. Churchill. A Preliminary Report of a Biological Survey of the Lakes of South Dakota. [publisher not identified], 1927.