Be a good friend – and don’t tolerate those who aren’t
When Friendship Hurts: Dr. Jan Yager
Touchstone, 2002
Resolving friendship problems: Dr. Irene Levine
10 tips for healthy friendships: Kansas State University
The negative health effects of bad friends: New York Times
What sets friendships apart from other relationships: Ohio University
Tips for communicating effectively with your friend: ReachOut.com