The rest of the page is basically toned in the same way.
However, when applying two screen tone layers over another, make sure to avoid moirés.
You can usually achieve that by positioning them carefully pixel by pixel until they are properly aligned.
Try to refrain from rotating the screen tone layers to stay on the safe side (rotating exactly by 90° or 180° isn't a problem of course).

And btw, the same thing i said to contrasts applies to tones: don‘t use too many different kinds.
On this page I used 3 types; a light one, a dark one and a gradient tone.
Sometimes texture and pattern tones can be nice, but again, try not to overuse them.

Many mangaka admit that they have a bad habit of using too many tones (...and because of that end up doing all-nighters to make it till the deadline XD )