Gaya APA

Nietzsche, F., Kaufmann, W. (1978). Thus spoke Zarathustra: a book for all and none (-). New York, USA: Penguin Books.

Gaya MLA

Nietzsche, Friedrich., Kaufmann, Walter. "Thus spoke Zarathustra: a book for all and none". - New York, USA: Penguin Books, 1978. e-book.