Apophthegmata Laconica
Plutarch
Plutarch. Moralia, Vol. III. Babbitt, Frank Cole, editor. Cambridge, MA: Harvard University Press; London: William Heinemann Ltd., 1931 (printing).
τείχη δὲ ἔλεγεν εἶναι τῆς Σπάρτης τοὺς νέους, ὅρια δὲ τὰς ἐπιδορατίδας.