Foster, R. J. (1978). Celebration of discipline: The path to spiritual growth. Harper & Row.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFoster, Richard J. Celebration of Discipline: The Path to Spiritual Growth. New York: Harper & Row, 1978.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFoster, Richard J. Celebration of Discipline: The Path to Spiritual Growth. Harper & Row, 1978.
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