Cita APA (7th ed.)
Barnes, J. (1987). Early Greek philosophy. Penguin books.
Cita Chicago (17th ed.)
Barnes, Jonathan. Early Greek Philosophy. New York: Penguin books, 1987.
Cita MLA (9th ed.)
Barnes, Jonathan. Early Greek Philosophy. Penguin books, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.