Guiry, Michael D. (2015). Cosmarium quadrigemme. In: Guiry, M.D. & Guiry, G.M. (2017). AlgaeBase. World-wide electronic publication, National University of Ireland, Galway (taxonomic information republished from AlgaeBase with permission of M.D. Guiry). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=700590 on 2018-01-23
Copyright notice: the information originating from AlgaeBase may not be downloaded or replicated by any means, without the written permission of the copyright owner (generally AlgaeBase). Fair usage of data in scientific publications is permitted.