Cita APA (7th ed.)
Nietzsche, F. (1918). Also sprach Zarathustra. Alfred Kröner.
Cita Chicago (17th ed.)
Nietzsche, Friedrich. Also Sprach Zarathustra. Leipzig, Alemania: Alfred Kröner, 1918.
Cita MLA (9th ed.)
Nietzsche, Friedrich. Also Sprach Zarathustra. Alfred Kröner, 1918.
Atenció: Aquestes cites poden no estar 100% correctes.