Which would be the most reliable source of information to use for a history report

Explanation:

Encyclopedias are written by an academic source, which transform them in a reliable scholarly source.

On the other hand, a magazina article is written and corrected by an editorial which is not academic in most of the cases. Similarly, a newspaper is based in editors about different topic outside the academica environment.

Finally, a TV show is the least trustworthy of the choices, because must of the time, TV shows are made to just entertain to increase their raitings.

Therefore, the right answer is an encyclopedia.