Sources : Karpman, Stephen B. (1968). « Fairy Tales and Script Drama Analysis », Transactional Analysis Bulletin, vol. 7, no 26, p. 39-43 - version édition : Karpman, Stephen B. (2014). A Game Free Life: The Definitive Book on the Drama Triangle and Compassion Triangle. San Francisco : Drama Triangle Publications, 300 p. ISBN : 978-0-9905867-0-8.