APA (7th ed.) Citation

Nietzsche, F. W. (1999). Thus spake Zarathustra by Friedrich Wilhelm Nietzsche. Project Gutenberg Literary Archive Foundation.

Chicago Style (17th ed.) Citation

Nietzsche, Friedrich Wilhelm. Thus Spake Zarathustra by Friedrich Wilhelm Nietzsche. Salt Lake City: Project Gutenberg Literary Archive Foundation, 1999.

MLA (9th ed.) Citation

Nietzsche, Friedrich Wilhelm. Thus Spake Zarathustra by Friedrich Wilhelm Nietzsche. Project Gutenberg Literary Archive Foundation, 1999.

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