OVNIS: La Respuesta Definitiva
| Prologue by | Walter H. Andrus Jr. |
| Editor | Anna Mumford |
| Copyright Holder (Illustrations) | Reed International Books Ltd |
| Publisher | Susaeta |
| Contributing Writer | Dennis Stacy, Edoardo Russo, Hilary Evans, Cynthia Hinds, Paul Norman, Irene Granchi |
| Copyright Holder (Text) | John Spencer (2) |
| Copyright Holder (This Edition) | Susaeta Ediciones |
| Art Director/Editor | Bob Gordon |
| Copyright Holder (Design) | Reed International Books Ltd |
| Format | Hardback |
| Language | Spanish |
| Location | Spain |
| Copyright | 1991 |
| Copyright | 1992 |
| Pages / Font | 194 pages |
| ISBN 10 | 84-305-7285-6 |
| Barcode (EAN) | 9 788430 572854 |
| Other | Ref. 024 |
| Chapters | Refer to image |
| Notes | HxWxD (30.3 x 22.2 x 1.8) cm |
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