Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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