On the Short Mystery Fiction Society Yahoo group, Victor J. Banis posted the following link:
This is a link to a large file (which may take a long time to download if your Internet connection is dial-up), but beginning on page 54 is one of the best--if the not the best--article on Point-of-View that I've ever read.
Written by Suzanne Brockmann, who I know nothing about other than the information that's included in the file, this article will benefit writers no matter what their skill level.
Read it. You'll learn a lot.