Full Idea
The internalist would claim that even if the belief is caused by the true fact to which it refers, it is also necessary that the believer believes that this is how their belief arose, and not some other way.
Gist of Idea
For internalists we must actually know that the fact caused the belief
Source
Jonathan Dancy (Intro to Contemporary Epistemology [1985], 3.5)
Book Reference
Dancy,Jonathan: 'Introduction to Contemporary Epistemology' [Blackwell 1985], p.47
A Reaction
I'm converted to internalism. If the belief is externally supported in the right way, then it may well be a true belief, but knowledge needs critical faculties, and justifications which can be articulated.