APA (7th ed.) Citation

Gregory, J. T. (1942). Pliocene vertebrates from Big Spring Canyon, South Dakota. University of California Press.

Chicago Style (17th ed.) Citation

Gregory, Joseph Tracy. Pliocene Vertebrates from Big Spring Canyon, South Dakota. Berkeley, CA: University of California Press, 1942.

MLA (9th ed.) Citation

Gregory, Joseph Tracy. Pliocene Vertebrates from Big Spring Canyon, South Dakota. University of California Press, 1942.