Maxime Cum Principibus Viris Philosopho Esse Disserendum

Περὶ τοῦ ὅτι μάλιστα τοῖς ἡγεμόσι δεῖ τὸν φιλοσοφόν διαλέγεσθαι Plutarch. Plutarchi Chaeronensis Moralia, Vol V. Vernardakēs, Grēgorios N., editor. Leipzig: Teubner, 1893.

That a Philosopher Ought Chiefly to Converse with Great Men (eng) Plutarch. Plutarch's Morals, Vol. II. Goodwin, William W., editor; Chetwood, Knightley, translator. Boston: Little, Brown, and Company; Cambridge: Press of John Wilson and Son, 1874. That a Philosopher Ought to Converse Especially with Men in Power (eng) Plutarch. Moralia, Vol. X. Fowler, Harold North, translator. Cambridge, MA: Harvard University Press; London: William Heinemann Ltd., 1936 (printing).