De or het studiehandleiding?

The correct Dutch article is:

de studiehandleiding

Rule Words ending in -ing: almost always de. See the rule

How to use studiehandleiding

the studiehandleidingde studiehandleiding
this studiehandleidingdeze studiehandleiding
that studiehandleidingdie studiehandleiding
our studiehandleidingonze studiehandleiding
your studiehandleidingjouw studiehandleiding
every studiehandleidingelke studiehandleiding
which studiehandleiding?welke studiehandleiding?
a big studiehandleiding / the big studiehandleidingeen grote studiehandleiding, de grote studiehandleiding