APA (7th ed.) Citation

Nietzsche, F. W. Also sprach Zarathustra. Alfred Kröner.

Chicago Style (17th ed.) Citation

Nietzsche, Friedrich Wilhelm. Also Sprach Zarathustra. Leipzig: Alfred Kröner.

MLA (9th ed.) Citation

Nietzsche, Friedrich Wilhelm. Also Sprach Zarathustra. Alfred Kröner.

Warning: These citations may not always be 100% accurate.