APA (7th ed.) Citation

Schmidt, K. P. (1938). New crocodilians from the Upper Paleocene of western Colorado. [publisher not identified].

Chicago Style (17th ed.) Citation

Schmidt, Karl Patterson. New Crocodilians from the Upper Paleocene of Western Colorado. Chicago: [publisher not identified], 1938.

MLA (9th ed.) Citation

Schmidt, Karl Patterson. New Crocodilians from the Upper Paleocene of Western Colorado. [publisher not identified], 1938.