| 978-958-04-5372-7 | Teenagers Student's Book 6th | Educactiva | Cynthia Miller
Elizabeth Rodríguez Gantiva
Reinel Wilches Sánchez
Julián Velásquez Osorio
| 1999 |
| 978-958-04-5368-0 | Teenagers Workbook 9thh | Educactiva | Sofia Camila Ruíz Jiménez
Julián Velásquez Osorio
| 1999 |
| 978-958-04-5367-3 | Teenagers Workbook 8th | Educactiva | Sofia Camila Ruíz Jiménez
Julián Velásquez Osorio
| 1999 |
| 978-958-04-5370-3 | Teenagers Workbook 11th | Educactiva | Raquel Sanmiguel Ardila
Julián Velásquez Osorio
| 1999 |
| 978-958-04-5369-7 | Teenagers Workbook 10th | Educactiva | Cynthia Miller
Julián Velásquez Osorio
| 1999 |
| 978-958-04-5365-9 | Teenagers Worbook 6th | Educactiva | Sofia Camila Ruíz Jiménez
Julián Velásquez Osorio
| 1999 |
| 978-958-04-5375-8 | Teenagers Student's Book 9thh | Educactiva | Cynthia Miller
Elizabeth Rodríguez Gantiva
Reinel Wilches Sánchez
Julián Velásquez Osorio
| 1999 |
| 978-958-04-5374-1 | Teenagers Student's Book 8th | Educactiva | Cynthia Miller
Elizabeth Rodríguez Gantiva
Reinel Wilches Sánchez
Julián Velásquez Osorio
| 1999 |
| 978-958-04-5373-4 | Teenagers Student's Book 7th | Educactiva | Elizabeth Rodríguez Gantiva
Reinel Wilches Sánchez
Julián Velásquez Osorio
| 1999 |
| 978-958-9094-29-7 | Curso práctico: Administración de personal | Tecnomundo Editores | Clara Lucía Martínez de Bohorquez
Julián Velásquez Osorio
| 1997 |
| 978-958-04-5377-2 | Teenagers Student's Book 11th | Educactiva | Raquel Sanmiguel Ardila
Julián Velásquez Osorio
| 1999 |
| 978-958-04-5376-5 | Teenagers Student's Book 10th | Educactiva | Cynthia Miller
Julián Velásquez Osorio
| 1999 |
| 978-958-9094-43-3 | Mitología 2010 curso práctico de lecto-escritura | Tecnomundo Editores | Tecnomundo Editores
Julián Velásquez Osorio
| 2003 |
| 978-958-9094-35-8 | Magic English | Tecnomundo Editores | Colectivo Tecnomundo Editores ltda
Julián Velásquez Osorio
| 1998 |
| 978-958-97137-1-6 | El castillo de los sueños | Quorum Ediciones | Marta del Pilar Rodríguez Rodríguez
John Hernández Martinez
Julián Velásquez Osorio
| 2002 |
| 978-958-9094-30-3 | Curso práctico: Telemercadeo | Tecnomundo Editores | Carlos Eduardo Guerrero Álvarez
Julián Velásquez Osorio
| 1997 |
| 978-958-9094-31-0 | Curso práctico: Inventario de mercancias | Tecnomundo Editores | Harvey Henao
María Claudia Gómez Londoño
Julián Velásquez Osorio
| 1997 |