Quotation marks vs Italics for sourcing articles

I wanted to source an online article (just a regular one, not part of a longer work) and was unsure whether to use quotation marks or italics. I know that it is generally advised to use quotation marks for shorter sources, but I have heard conflicting thoughts. Also, I should not use a comma in front of the title right?

Without Comma: I read an article titled "Climate Change".

With Comma: I read an article titled, "Climate Change".

I would assume the first one is better because it the title is an essential phrase