"Gaming academic Jesse Schell expounds on chocofication and motivating players to play and pay". Interview with Dean Takahashi, venturebeat.com. February 10, 2013.
Shannon Messenger, Suzanne Young, Jodi Picoult, Samantha van Leer, Lauren Barnholdt (2013). “Get a Taste of Pulseit!: Free Pulseit eSampler”, p.130, Simon and Schuster