Wulf, A. (2015). The invention of nature: Alexander von Humboldt's new world (First American edition.). Alfred A. Knopf.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWulf, Andrea. The Invention of Nature: Alexander Von Humboldt's New World. First American edition. New York: Alfred A. Knopf, 2015.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWulf, Andrea. The Invention of Nature: Alexander Von Humboldt's New World. First American edition. Alfred A. Knopf, 2015.
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