World Register of Marine Species (WoRMS)
Schuchert, P.; Choong, H.; Galea, H.; Hoeksema, B.; Lindsay, D.; Manko, M.; Pica, D. (2026). World Hydrozoa Database. Campanularia compressa Clark, 1877. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=152073 on 2026-08-03
Clark, S. F. (1877). Report on the hydroids collected on the coast of Alaska and the Aleutian Islands, by W.H. Dall, U.S. Coast Survey, and party, from 1871 to 1874 inclusive. Proceedings of the Academy of Natural Sciences of Philadelphia. 28, 209-238.