Ortberg, J. (2014). Soul keeping: Caring for the most important part of you (1st [edition].). Zondervan.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOrtberg, John. Soul Keeping: Caring for the Most Important Part of You. 1st [edition]. Grand Rapids, Michigan: Zondervan, 2014.
एमएलए (8वां संस्करण) प्रशस्ति पत्रOrtberg, John. Soul Keeping: Caring for the Most Important Part of You. 1st [edition]. Zondervan, 2014.
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