The book peacetoday referenced is titled "Love Must Be Tough". I read the book many years ago, and in my opinion, it's not a book of techniques that would work well when dealing with a MLCer/person in depression. MLCers already feel controlled and manipulated and they would see the techniques as trying to change their minds and if push, come to shove, they will take the road of least resistance.
It would be up to you to decide whether you want to try some of the techniques and see if they work or not. Again, you have to try different things along the way.
Here is a link to some recommended reading materials that you may want to scroll through:
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.