Dean, H. K. (2001). Marine Biodiversity of Costa Rica: The phyla Sipuncula and Echiura.
Chicago Style aipamenaDean, Harlan K. Marine Biodiversity of Costa Rica: The Phyla Sipuncula and Echiura. 2001.
MLA aipamenaDean, Harlan K. Marine Biodiversity of Costa Rica: The Phyla Sipuncula and Echiura. 2001.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.