APA (7th ed.) Citation

Zeller, E. (1955). Outlines of the history of Greek philosophy (13th.ed.). Meridian books.

Chicago Style (17th ed.) Citation

Zeller, Eduard. Outlines of the History of Greek Philosophy. 13th.ed. New York: Meridian books, 1955.

MLA (9th ed.) Citation

Zeller, Eduard. Outlines of the History of Greek Philosophy. 13th.ed. Meridian books, 1955.