Cite in-text with parentheses for APA or MLA. You need the name of the original author, in this case Plato, and either the date or the page numbers referenced. MLA uses the page numbers and APA uses the publication date. Reference the publication date of the book, not the original work. For example: APA (Plato, 1955) and MLA (Plato, 48-92).
Cite for APA translations with the author, publication date, title, translators, publishing location and company, and the original writing date. For example: Plato. (1955). The Republic (Penguin Classics). (D. Lee, Trans.). London, England: Putnam Books. (Original work written 360 BCE).
Cite in MLA style with the name of the author, the book title, the name of the translator, publication information and the medium referenced. For example: Plato. Meno. Trans. Benjamin Jowett. Chicago, IL: The Great Books Foundation, 1955. Print.
Cite editions of a book by adding the edition number after the title. For example: Plato (1955). The Republic. 3rd Ed. This applies to APA and MLA citations.