APA-referens (7:e uppl.)

Nietzsche, F. W., Del Caro, A., & Pippin, R. B. (2006). Thus spoke Zarathustra: A book for all and none. Cambrige University Press.

Chicago-referens (17:e uppl.)

Nietzsche, Friedrich Wilhelm, Adrian Del Caro, och Robert B. Pippin. Thus Spoke Zarathustra: A Book for All and None. Cambridge ; New York: Cambrige University Press, 2006.

MLA-referens (8:e uppl.)

Nietzsche, Friedrich Wilhelm, et al. Thus Spoke Zarathustra: A Book for All and None. Cambrige University Press, 2006.