Catálogo Bibliográfico
1. | Life pre-intermediate : B1 / John Hughes, Helen Stephenson, Paul Dummett. | 2010 | Libro | |
2. | World English 1B : real people, real places, real language / Martin Milner. — 2nd ed. | 2010 | Libro | |
3. | Life intermediate : B1+ / Helene Stephenson, Paul Dummett, John Hughes. | 2010 | Libro | |
4. | World English 1A : real people, real places, real language / Martin Milner. — 2nd ed. | 2010 | Libro |