| Citation | Jefferson, T.A., S. Leatherwood and M.A. Webber, 1993 FAO species Identification Guide: Marine Mammals of the World. Rome, FAO. 320 p. + 587 figures. |
| Ref. | 1394 Jefferson, T.A., S. Leatherwood and M.A. Webber, 1993 |
| Page | 230-231 |
| Named Used as Valid | Zalophus californianus wollebaeki |
| Locality | |
| Distribution | Galapagos Islands. |