Gregory, P. (2016). Three sisters, three queens (First Touchstone hardcover edition.). Touchstone, an imprint of Simon & Schuster, Inc..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGregory, Philippa. Three Sisters, Three Queens. First Touchstone hardcover edition. New York, NY: Touchstone, an imprint of Simon & Schuster, Inc., 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGregory, Philippa. Three Sisters, Three Queens. First Touchstone hardcover edition. Touchstone, an imprint of Simon & Schuster, Inc., 2016.
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