Louis Van Gaal: The Biography by Maarten Meijer, out in July.
http://www.amazon.co.uk/gp/product/0...tpmanunblog-21
"If I had the opportunity to substitute Jasper, I would've done it, but I had already used three substitutes, so I couldn't do that. I substituted Janmaat for Indi because Martins Indi already had a yellow card. I didn't want to take a risk with De Jong because he would be injured. I substituted Van Persie because he was exhausted."
http://www.amazon.co.uk/gp/product/0...tpmanunblog-21
"If I had the opportunity to substitute Jasper, I would've done it, but I had already used three substitutes, so I couldn't do that. I substituted Janmaat for Indi because Martins Indi already had a yellow card. I didn't want to take a risk with De Jong because he would be injured. I substituted Van Persie because he was exhausted."