Dajnoki, Krisztina, et al. “Investigation of Motivation Based on Herzberg’s Two-Factor Model and Self-Determination Theory”. Studia Mundi – Economica, vol. 8, no. 2, June 2021, pp. 2-12, https://doi.org/10.18531/Studia.Mundi.2021.08.02.2-12.