Does your program require that you use APA Style for the research papers you write?
Did you go out and buy the brand new 6th Edition of the Publication Manual of the American Psychological Association?
Yes? Well, I have some bad news for you.
It seems that the first printing of the 6th edition is riddled with errors. What's worse is that many of the errors are in the very examples you count on to make sure that your own writing is error-free.
How do you know if your copy of the 6th edition Manual is from the first printing?