Aristotle. (2009). The Nicomachean ethics. Oxford University Press.
Balaban, O. (1987). The myth of Protagoras and Plato’s theory of measurement. History of Philosophy Quarterly, 4(4), 371–384.
Dyson, M. (1976). Knowledge and hedonism in Plato’sProtagoras. The Journal of Hellenic Studies, 96, 32–45. https://doi.org/10.2307/631222
Eggen, P., & Kauchak, D. (2012). Educational psychology: Windows on the classroom. Pearson Education Korea.
Fletcher, E. (2014). Plato on Pure Pleasure and the Best Life. Phronesis, 59(2), 113–142. https://doi.org/10.1163/15685284-12341263
Haidt, J. (2012). The righteous mind: Why good people are divided by politics and religion. Pantheon Books.
Kant, I. (2006). Groundwork of the metaphysics of morals. Cambridge University Press.
Lickona, T. (1991). An integrated approach to character development in the elementary school classroom. Moral, character, and civic education. Teacher’s College Press. pp. 67–83.
McDowell, J. (2000). Mind and world: With a new introduction by the author. Harvard University Press.
Ministry of Education. (1992). Korean elementary school (polite life, moral education, wise life, social studies, and science) explanation book. Ministry of Education.
Ministry of Education. (1997). Korean elementary school Korean language, moral education, and social studies commentary. Ministry of Education.
Morris, M. (2006). Akrasia in the Protagoras and the Republic. Phronesis, 51(3), 195–229. https://doi.org/10.1163/156852806778134072
Müller-Lyer, F. C. (1889). Optical illusions (German). Archiv für Anatomie und Physiologie, Physiologische Abteilung, 2(Supplement), 263–270.
NamGung, H. (2022). Designing a method of moral education based on an integrated approach to moral judgment. SAGE Open, 12(1), 1–11.
Narvaez, D., & Rest, J. R. (1995). Four components of acting morally. In: Kurtines, W. M., Gewirtz, J. L. (editors). Moral development: An introduction. Allyn & Bacon. pp. 385–400.
Palmer, A. (1981). Beliefs. Philosophy, 56(215), 33–45.
Penner, T. (1990). Plato and Davidson: Parts of the soul and weakness of will. Canadian Journal of Philosophy Supplementary, 16, 35–74. https://doi.org/10.1080/00455091.1990.10717222
Piaget J. (1970). Genetic epistemology. Columbia University Press.
Plato. (1897). The Philebus of Plato. Cambridge University Press.
Plato. (1901). Sophist. In: The dialogues of Plato, translated into English with analyses and introductions. Charles Scribner’s Sons. pp. 421–510. https://doi.org/10.1037/13289-005
Plato. (1909). Gorgias. Teubner.
Plato. (1911). Plato’s Phaedo. Clarendon Press.
Plato. (2007). The republic 2nd ed. Penguin.
Plato. (2009a). Protagoras. Oxford University Press.
Plato. (2009b). Meno and other dialogues. Oxford University Press.
Reid, T. (1969). Essays on the intellectual powers of man. The MIT Press.
Roeser, S. (2015). Moral emotion and intuition. CIR.
Sullivan, J. P. (1961). The hedonism in Plato’s Protagoras. Phronesis, 6(1–2), 10–28. https://doi.org/10.1163/156852861X00026
Wegener, C. W. (1953). Plato: Idea and thing. Journal of General Education, 7(2), 89–99. http://www.jstor.org/stable/27795421
Wilburn, J. (2016). Plato’s Protagoras the hedonist. Classical Philology, 111(3), 224–244. https://doi.org/10.1086/687099
Wolfsdorf, D. (2011). Plato’s conception of knowledge. Classical World, 105(1), 57–75. https://doi.org/10.1353/clw.2011.0115
Zeyl, D. J. (1980). Socrates and hedonism: ‘Protagoras’ 351b-358d. Phronesis, 25(3), 250–269. https://doi.org/10.1163/156852880X00151