The following people is an example of an unreliable narrator would be D. Edgar Allan Poe; however, he is also the author of "The Tell-Tale Heart".
Poe's unreliable narration comes from his personal background of turmoil and suggesting to the readers that they think that he's mad, and make presumptions behind it.
if you only get to use one notecard, I would say just the source information but if you get more than one then do one or two facts or thoughts per notecard:3