Friedlander, P. (1969). Plato: An introduction. Princeton University Press.
Lua i Stíl Chicago (17ú heag.)Friedlander, Paul. Plato: An Introduction. Princeton, New Jersey: Princeton University Press, 1969.
Lua MLA (9ú heag.)Friedlander, Paul. Plato: An Introduction. Princeton University Press, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.