1. Ariely, D. 2016. Payoff: The Hidden Logic That Shapes Our Motivations. New York: Simon & Schuster.
2. Bearden. 2001. Ultimatum Bargaining Experiments: The State of the Art. https://papers.ssrn.com/sol3/papers.cfm?abstract_id=626183.
3. Benedict XVI. 2009. Caritas in Veritate. Vatican City: Libreria Editrice Vaticana. http://w2.vatican.va/content/benedict-xvi/en/encyclicals/documents/hf_ben-xvi_enc_20090629_caritas-in-veritate.html.
4. A Blueprint for Better Business. 2018. Fulfilment at Work. Accessed May 31, 2018. http://www.blueprintforbusiness.org/wp-content/uploads/2018/01/Blueprint_FulfilmentAtWork_Jan2018.pdf.
5. Cameron, K., and J. Dutton. 2003. Positive organizational scholarship: Foundations of a new discipline. Oakland: Berrett-Koehler Publishers.