Block, J. (1987). The Insel-Verlag "Zarathustra": An Untold Tale of Art and Printing. Pantheon.
Chicago-Zitierstil (17. Ausg.)Block, Jane. "The Insel-Verlag "Zarathustra": An Untold Tale of Art and Printing." Pantheon 1987.
MLA-Zitierstil (8. Ausg.)Block, Jane. "The Insel-Verlag "Zarathustra": An Untold Tale of Art and Printing." Pantheon, 1987.
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