Hass, R. (2012). What light can do: Essays on art, imagination, and the natural world. Ecco/HarperCollins Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHass, Robert. What Light Can Do: Essays on Art, Imagination, and the Natural World. New York: Ecco/HarperCollins Publishers, 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHass, Robert. What Light Can Do: Essays on Art, Imagination, and the Natural World. Ecco/HarperCollins Publishers, 2012.
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