Penny, L. (2012). The beautiful mystery: A Chief Inspector Gamache novel. St. Martin's Minotaur.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPenny, Louise. The Beautiful Mystery: A Chief Inspector Gamache Novel. New York: St. Martin's Minotaur, 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPenny, Louise. The Beautiful Mystery: A Chief Inspector Gamache Novel. St. Martin's Minotaur, 2012.
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