Gravel, E. (2017). Olga and the smelly thing from nowhere (First edition.). Harper, an imprint of HarperCollinsPublishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGravel, Elise. Olga and the Smelly Thing from Nowhere. First edition. New York, NY: Harper, an imprint of HarperCollinsPublishers, 2017.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGravel, Elise. Olga and the Smelly Thing from Nowhere. First edition. Harper, an imprint of HarperCollinsPublishers, 2017.
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