APA (7th ed.) Citation

Barnes, J. (1987). Early Greek philosophy. Penguin Books.

Chicago Style (17th ed.) Citation

Barnes, Jonathan. Early Greek Philosophy. Harmondsworth, Middlesex, England ; New York, N.Y., U.S.A.: Penguin Books, 1987.

MLA (9th ed.) Citation

Barnes, Jonathan. Early Greek Philosophy. Penguin Books, 1987.