Wilber, K., & Wilber, T. K. (2000). Grace and grit: Spirituality and healing in the life and death of Treya Killam Wilber (Second edition.). Shambhala.
Цитирование в стиле Чикаго (17-е изд.)Wilber, Ken, и Treya Killam Wilber. Grace and Grit: Spirituality and Healing in the Life and Death of Treya Killam Wilber. Second edition. Boston: Shambhala, 2000.
Цитирование MLA (9-е изд.)Wilber, Ken, и Treya Killam Wilber. Grace and Grit: Spirituality and Healing in the Life and Death of Treya Killam Wilber. Second edition. Shambhala, 2000.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.