The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.
- Brusca, Richard C., and Gary J. Brusca. 2002. Invertebrates, Second Edition. xx + 936
- Nishikawa, Teruaki. 1998. Nomenclatural remarks on the family-group names of the Phylum Echiura. Proceedings of the Biological Society of Washington, vol. 111, no. 2. 249-256
- Stephen, A. C., and S. J. Edmonds. 1972. The Phyla Sipuncula and Echiura. vii + 528
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