| Ref. | Description | Named Used | Page |
|---|---|---|---|
| 833 | Ruppert, E.E., R.S. Fox and R.D. Barnes 2004 Invertebrate Zoology. A functional evolutionary approach. 7th Ed. | Halgerda formosa | |
| 866 | Gosliner, T. 1987 Nudibranchs of Southern Arfrica: A guide to opistobranch molluscs of Southern Africa. | Halgerda formosa | 69 |
| 104419 | Coleman, N. 2001 1001 Nudibranchs catalogue of Indo-Pacific sea slugs. | Halgerda formosa | 58 |