Do I need to follow a coursebook to take an internationally recognizable English exam?
You don’t have to follow a course book but it is advisable to do so because that way you practice all the skills that are tested in the exam.
Where can I study for an internationally recognizable English exam?
You can have online or in-person classes. They can be with a private tutor or in a language academy.
What materials can I use to prepare?
You can use previous tests, coursebooks, online materials, mock tests, etc.