Levy 1911. Levy, Oscar, ed. (1911). "The Use and Abuse of History". The Complete Works of Friedrich Nietzsche. Vol. 5. Translated by Adrian Collins. Macmillan. pp. 1–100.
Robb 1986, p. 339. Robb, Kevin (July 1986). "'Psyche' and 'Logos' in the Fragments of Heraclitus: The Origins of the Concept of Soul". The Monist. 69 (3): 315–351. doi:10.5840/monist198669320. JSTOR27902979.
Giannopoulou 2015, p. 75. Giannopoulou, Zina (2015). "Self-Knowledge in Plato's Theaetetus and Alcibiades I". Proceedings of the Boston Area Colloquium in Ancient Philosophy. 30 (1): 73–93. doi:10.1163/22134417-00301P08.
Jolles 1954, pp. 62–65. Jolles, Matthijs (1954). "Goethe's Conception of Friendship". Publications of the English Goethe Society. 23 (1): 53–73. doi:10.1080/09593683.1954.11785647.
gutenberg.org
Alexander Pope. "Epistle II". Essay on Man – via Project Gutenberg.
jstor.org
Robb 1986, p. 339. Robb, Kevin (July 1986). "'Psyche' and 'Logos' in the Fragments of Heraclitus: The Origins of the Concept of Soul". The Monist. 69 (3): 315–351. doi:10.5840/monist198669320. JSTOR27902979.
Booth 1977, p. 380. Booth, Edward (1977). "St. Augustine's "notitia sui" related to Aristotle and the early Neo-Platonists". Augustiniana. 27 (3/4): 364–401. JSTOR44992259.
Pliny the Elder. "Natural History". 7.32 – via Perseus Digital Library.
Plato. "Protagoras". 343a–343b – via Perseus Digital Library.
Xenophon. "Hellenica". 2.4.40–42 – via Perseus Digital Library.
Xenophon. "Cyropaedia". 7.2.20–24 – via Perseus Digital Library.
Plato. "Charmides". 164d–165a – via Perseus Digital Library.
Plato. "Phaedrus". 229e–230a – via Perseus Digital Library.
umich.edu
quod.lib.umich.edu
Sterne 1760. Sterne, Laurence (1760). "Sermon VI: Self-knowledge". The Sermons of Mr. Yorick. R. and J. Dodsley. pp. 79–103 – via ECCO Text Creation Partnership.