Halpern, J., & Blistein, D. (2019). Opium: How an ancient flower shaped and poisoned our world (First edition.). Hachette Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHalpern, John, और David Blistein. Opium: How an Ancient Flower Shaped and Poisoned Our World. First edition. New York: Hachette Books, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHalpern, John, और David Blistein. Opium: How an Ancient Flower Shaped and Poisoned Our World. First edition. Hachette Books, 2019.
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