APA (7th ed.) Citation

Zeller, E. (1931). Outlines of the history of greek philosophy (3a. ed.). Routledge & Kegan Paul.

Chicago Style (17th ed.) Citation

Zeller, Eduard. Outlines of the History of Greek Philosophy. 3a. ed. Londres: Routledge & Kegan Paul, 1931.

MLA (9th ed.) Citation

Zeller, Eduard. Outlines of the History of Greek Philosophy. 3a. ed. Routledge & Kegan Paul, 1931.