APA (7th ed.) Citation

Wells, S. P. (1952). A review of the North American Cretaceous elasmosaurs. University of California Press.

Chicago Style (17th ed.) Citation

Wells, Samuel Paul. A Review of the North American Cretaceous Elasmosaurs. Berkeley: University of California Press, 1952.

MLA (9th ed.) Citation

Wells, Samuel Paul. A Review of the North American Cretaceous Elasmosaurs. University of California Press, 1952.