Yes, because (12) is referring to a page number.
I mean, if you're writing an essay, this would be correct. But if you're just stating your opinion, that's wouldn't need to be cited.
Answer:
For fear of retaliation against them.
Explanation:
Douglas wouldn't want fot the boys who taught him how to read to get in trouble on his behalf. He was afraid that they would be repremended or punished for having taught him how to read.
