↑ The Apology translated by Benjamin Jowett, section 4
↑ Apology, Greek text, edited J. Burnet, section 19c
↑ Sommerstein, Alan. (ed.) Lysistrata, The Acharnians, The Clouds. Penguin Books 1973, p. 16
↑ Aristophanes: Clouds K. J. Dover (ed), Oxford University Press 1970, Introduction p. IX
↑ "Greek Drama" Peter Levi, in The Oxford History of the Classical World J. Boardman, J. Griffin and O. Murray (eds), Oxford University Press 1986, p. 176
