Cita APA

Robison, R. A., & Richards, B. C. Paleontological contributions / R. A. Robison and B. C. Richards. Lawrence, Kansas : The university of Kansas.

Citación estilo Chicago

Robison, R. A., y B. C. Richards. Paleontological Contributions / R. A. Robison and B. C. Richards. Lawrence, Kansas : The university of Kansas.

Cita MLA

Robison, R. A., y B. C. Richards. Paleontological Contributions / R. A. Robison and B. C. Richards. Lawrence, Kansas : The university of Kansas.