Wilber, K., & Wilber, T. K. (2000). Grace and grit: Spirituality and healing in the life and death of Treya Killam Wilber (Second edition.). Shambhala.
Citação do estilo Chicago (17ª ed.)Wilber, Ken, e Treya Killam Wilber. Grace and Grit: Spirituality and Healing in the Life and Death of Treya Killam Wilber. Second edition. Boston: Shambhala, 2000.
Citação MLA (9ª ed.)Wilber, Ken, e Treya Killam Wilber. Grace and Grit: Spirituality and Healing in the Life and Death of Treya Killam Wilber. Second edition. Shambhala, 2000.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.