Ellis, R. (2003). Sea dragons: Predators of the prehistoric oceans. University Press of Kansas.
Cita Chicago Style (17a ed.)Ellis, Richard. Sea Dragons: Predators of the Prehistoric Oceans. Lawrence, Kan.: University Press of Kansas, 2003.
Cita MLA (8a ed.)Ellis, Richard. Sea Dragons: Predators of the Prehistoric Oceans. University Press of Kansas, 2003.
Precaución: Estas citas no son 100% exactas.