Cita APA

Lucas, S. G., & Alvarado, G. E. (2010). Fossil proboscidea from the upper cenozoic of central america: Taxonomy, evolutionary and paleobiogeographic significance. Universidad de Costa Rica.

Citación estilo Chicago

Lucas, Spencer G., y Guillermo E. Alvarado. Fossil Proboscidea From the Upper Cenozoic of Central America: Taxonomy, Evolutionary and Paleobiogeographic Significance. Universidad de Costa Rica, 2010.

Cita MLA

Lucas, Spencer G., y Guillermo E. Alvarado. Fossil Proboscidea From the Upper Cenozoic of Central America: Taxonomy, Evolutionary and Paleobiogeographic Significance. Universidad de Costa Rica, 2010.