| 978-607-493-353-6 | Trails Plus 3 Student's Book | U.D. Publishing | Edgar Jeremy
| 2013 |
| 978-607-493-354-3 | Trails Plus 3 Teacher's Guide | U.D. Publishing | Edgar Jeremy
| 2013 |
| 978-607-493-355-0 | Trails Plus 3 Reader | U.D. Publishing | Edgar Jeremy
| 2013 |
| 978-607-493-367-3 | Trails Plus 4 Workbook | U.D. Publishing | Edgar Jeremy
Jesús Ismael Vázquez Sánchez
| 2013 |
| 978-607-493-368-0 | Trails Plus 4 Student´s Book | U.D. Publishing | Edgar Jeremy
Francisco Javier Montiel Ponce
| 2013 |
| 978-607-493-372-7 | Trails Plus 4 Reader | U.D. Publishing | Edgar Jeremy
| 2013 |
| 978-607-493-373-4 | Trails Plus 4 Teacher´s Book | U.D. Publishing | Edgar Jeremy
| 2013 |
| 978-607-493-374-1 | Trails Plus 5 Student's Book | U.D. Publishing | Edgar Jeremy
| 2013 |
| 978-607-493-375-8 | Trails Plus 5 Teacher's Book | U.D. Publishing | Edgar Jeremy
| 2013 |
| 978-607-493-376-5 | Trails Plus 3 Workbook | U.D. Publishing | Edgar Jeremy
| 2013 |
| 978-607-493-377-2 | Trails Plus 5 Reader | U.D. Publishing | Edgar Jeremy
| 2013 |
| 978-607-493-385-7 | Trails Plus 4 Reader | U.D. Publishing | Edgar Jeremy
| 2013 |
| 978-607-493-389-5 | Trails Plus 4 Teacher´s Book | U.D. Publishing | Edgar Jeremy
| 2013 |
| 978-607-493-390-1 | Trails Plus 3 Workbook | U.D. Publishing | Edgar Jeremy
| 2013 |
| 978-607-493-392-5 | Trails Plus 3 Reader | U.D. Publishing | Edgar Jeremy
| 2013 |
| 978-607-493-394-9 | Trails Plus 5 Teacher´s Book | U.D. Publishing | Edgar Jeremy
| 2013 |
| 978-607-493-395-6 | Trails Plus 4 Student´s Book | U.D. Publishing | Edgar Jeremy
| 2013 |
| 978-607-493-397-0 | Trails Plus 4 Workbook | U.D. Publishing | Edgar Jeremy
| 2013 |
| 978-607-493-400-7 | Trails Plus 5 Student´s Book | U.D. Publishing | Edgar Jeremy
| 2013 |
| 978-607-493-403-8 | Trails Plus 5 Reader | U.D. Publishing | Edgar Jeremy
| 2013 |
| 978-607-493-410-6 | Trails Plus 3 Student´s Book | U.D. Publishing | Edgar Jeremy
| 2013 |
| 978-607-493-411-3 | Trails Plus 3 Teacher's Book | U.D. Publishing | Edgar Jeremy
| 2013 |
| 978-607-493-479-3 | Crossover Higher 2 Student's Book | U.D. Publishing | Anita Frances Heald
Edgar Jeremy
Robert Ivor Williams
| 2013 |
| 978-607-493-474-8 | Crossover Higher 2 Student's Book | U.D. Publishing | Anita Frances Heald
Edgar Jeremy
Robert Ivor Williams
| 2013 |
| 978-607-493-480-9 | Crossover Higher 2 Reader | U.D. Publishing | Anita Frances Heald
Edgar Jeremy
Robert Ivor Williams
| 2013 |