Wilber, K., & Wilber, T. K. (2000). Grace and grit: Spirituality and healing in the life and death of Treya Killam Wilber (Second edition.). Shambhala.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWilber, Ken, और Treya Killam Wilber. Grace and Grit: Spirituality and Healing in the Life and Death of Treya Killam Wilber. Second edition. Boston: Shambhala, 2000.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWilber, Ken, और Treya Killam Wilber. Grace and Grit: Spirituality and Healing in the Life and Death of Treya Killam Wilber. Second edition. Shambhala, 2000.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.