This has been bugging me. After researching half-heartedly, the conclusion I've drawn is that there is no "rule", just to pick a style and stay consistent. Example: The sun was shining brightly; it's (its?) reflection could be seen by all. I seem to be using this type of phrase rather often in a novel I just started. Opinions please! P.S. I'm an idiot as it pertains to the "rules" of grammar, so you can call me that or treat me that way. It might actually be more fun that way.