John Stuart Mill Quotes about Age
John Stuart Mill (1989). “J. S. Mill: 'On Liberty' and Other Writings”, p.67, Cambridge University Press
"Collected Works: Principles of political economy".
John Stuart Mill, Jeremy Bentham, John Troyer (2003). “The Classical Utilitarians: Bentham and Mill”, p.164, Hackett Publishing
John Stuart Mill (2016). “The Subjection of Women: Mill's Works”, p.5, VM eBooks
John Stuart Mill (1866). “Principles of Political Economy: With Some of Their Applications to Social Philosophy”, p.1