> With adjectives that are equal – If commas could be replaced with the word “and,” the adjectives are considered equal: a dark, scary dungeon. But, commas are not used when one of the adjectives is essential to the noun phrase: an expensive fur coat.
> Read more: How to Use Commas in Associated Press Style | eHow.com http://www.ehow.com/how_2337761_use-commas-associated-press-style.html#ixzz2QH75geu9