Schipper, E. W. (1965). Forms in Plato's later dialogues. M. Nijhoff.
Lua i Stíl Chicago (17ú heag.)Schipper, Edith Watson. Forms in Plato's Later Dialogues. The Hague: M. Nijhoff, 1965.
Lua MLA (9ú heag.)Schipper, Edith Watson. Forms in Plato's Later Dialogues. M. Nijhoff, 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.