
There are a couple of different ways you can do this.
Most common, 3 hole or 5 hole pamphlet stitch.
https://www.youtube.com/watch?v=nhAwIR-n_kg
For multiple signatures.
https://www.youtube.com/watch?v=r5DnhbJINw8
For no sew (travelers notebook style) signatures. This is one I like because I can easily add and remove pages.
https://www.youtube.com/watch?v=VRlSeEZEwH8