APA (7 वां संस्करण) प्रशस्ति पत्र
Ludwig, C. (1963). Mama was a missionary. Zondervan Pub. House.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Ludwig, Charles. Mama Was a Missionary. Grand Rapids: Zondervan Pub. House, 1963.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Ludwig, Charles. Mama Was a Missionary. Zondervan Pub. House, 1963.
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