# Exercise 9: Referencing using target headers

It can be really useful to refer to a specific section in your book  while working in a different file. Referencing can be done using target headers such as:

```
(<title>)=
```

1. Navigate to the file you want to work in (for example `book/some_content/overview.md`) and make sure you're in the correct branch.

2. Identify the section you want to reference and name it between brackets for example `exercise_1`.

```
(exercise_1)=
# Exercise 1: First file edit

Let's start with the most basic edit: add some text to a file and see that the website is updated...

```

3. There are three types of referencing:

* You can use the standard title text which will be the title after the target header

My favourite exercise was {ref}`exercise_1`.

```
My favourite exercise was {ref}`exercise_1`.
```
* You can also specify the title text of the target header (aka specify what the link will say):

My favourite exercise was {ref}`the first one <exercise_1>`.

```
My favourite exercise was {ref}`the first one <exercise_1>`.
```

* You can also use Markdown syntax, then the title text is also fully customizable.

My favourite exercise was [this one](exercise_1).

```
My favourite exercise was [this one](exercise_1).
```