Caffeine Quotes
Daniel G. Amen, M.D. (2012). “Use Your Brain to Change Your Age: Secrets to Look, Feel, and Think Younger Every Day”, p.94, Harmony
Rick Riordan (2013). “Percy Jackson: The Complete Series”, p.257, Penguin UK
Ilona Andrews (2013). “Magic Rises: A Kate Daniels Novel”, p.99, Penguin