Chapman, V. (2012). A perfect square: A Shipshewana Amish mystery. Zondervan.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रChapman, Vannetta. A Perfect Square: A Shipshewana Amish Mystery. Grand Rapids, MI: Zondervan, 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रChapman, Vannetta. A Perfect Square: A Shipshewana Amish Mystery. Zondervan, 2012.
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