Cita APA (7th ed.)
Webby, B. D. (2004). The great Ordovician biodiversification event. Columbia University Press.
Cita Chicago (17th ed.)
Webby, B. D. The Great Ordovician Biodiversification Event. New York ; Chichester, England: Columbia University Press, 2004.
Cita MLA (9th ed.)
Webby, B. D. The Great Ordovician Biodiversification Event. Columbia University Press, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.