Ensaio Sobre A Liberdade
| Format | Paperback |
| Language | Portuguese |
| Printed | 1973 |
| Original Title | On Liberty |
| Original Language | English |
| Author | John Stuart Mill |
| Publisher | Arcádia |
| Preface by | Orlando Vitorino |
| Revised by | Orlando Vitorino, Jaime Jacinto |
| Cover/Jacket Design by | Manuel Dias |
| Printed by | Empresa Norte Editora |
| Format | Paperback |
| Language | Portuguese |
| Location | Portugal |
| Printed | 1973 |
| Pages / Font | 250 pages |
| Edition No. | 525 |
Added by Xavier.Rafael