APA (7 वां संस्करण) प्रशस्ति पत्र
Walker, L. (2010). Choosing a sustainable future: Ideas and inspiration from Ithaca, NY. New Society Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Walker, Liz. Choosing a Sustainable Future: Ideas and Inspiration from Ithaca, NY. Gabriola Island, BC: New Society Publishers, 2010.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Walker, Liz. Choosing a Sustainable Future: Ideas and Inspiration from Ithaca, NY. New Society Publishers, 2010.
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