1. Hummingbird vision
2. Bartley, Glenn, and Andy Swash. 2022. Hummingbirds: A Celebration of Nature’s Jewels. Princeton, NJ: Princeton University Press.
3. Bolen, Jean Shinoda. 2007. Close to the Bone: Life-Threatening Illness as a Soul Journey. San Francisco: Conari Press.
4. Britannica T. Editors of Encyclopaedia. 2023. “Amen.” In Encyclopedia Britannica. https://www.britannica.com/topic/amen-prayer.
5. Dargert, Guy. 2018. The Snake in the Clinic: Psychotherapy’s Role in Medicine and Healing. London: Routledge.