Gardiner. Tales from an Uncertain World. University of Iowa Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGardiner. Tales from an Uncertain World. University of Iowa Press.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGardiner. Tales from an Uncertain World. University of Iowa Press.
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