"The Spectacular Self: Jean-Etienne Liotard's Self-Portrait Laughing". {{cite journal}}: Cite journal requires |journal= (help) ↑ Laërtius, Diogenes. Lives, Teachings and Sayings of the Eminent Philosophers, with an English translation by R.D. Hicks (1964-1965). Cambridge, Massachusetts/London: Harvard UP/W. Heinemann Ltd. ↑ Morris, Paul N.