Learn English – When is it appropriate to use “titled” vs. “entitled”

In my experinece you run into people and trouble:

I ran into Betty at the store today. I haven't seen her since college!
I ran into your co-worker Bob today.
Sorry I'm late; I ran into heavy traffic.

You come across objects:

I was cleaning up the kitchen and came across that phone bill you lost.
I was looking up (something) in the encylopedia and came across this interesting tidbit.

I'm not sure I'd use either when talking about a grammar error in a blog; I'd be more likely to say I found or noticed it. I don't know why that is.

Give credit to somebody: give recognition, praise, approval

The credit of this discovery will be given to you.

Reference: act of referring, a mention

You should make a reference to a dictionary. The book is full of references to places that I know well.

You see credits given to people at the end of movies. You do not refer to the source there. Similarly, people are given credit for discoveries made by them. You do not refer to the source here either.

But when you make a reference, you actually are referring to the source (i.e., it's location).

So, in your case, you should "make a reference" and not "give credit".