Hannah, S. (2018). The mystery of three quarters: The new Hercule Poirot mystery (First U.S. edition.). William Morrow, an imprint of HarperCollinsPublishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHannah, Sophie. The Mystery of Three Quarters: The New Hercule Poirot Mystery. First U.S. edition. New York, NY: William Morrow, an imprint of HarperCollinsPublishers, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHannah, Sophie. The Mystery of Three Quarters: The New Hercule Poirot Mystery. First U.S. edition. William Morrow, an imprint of HarperCollinsPublishers, 2018.
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