APA (7 वां संस्करण) प्रशस्ति पत्र
Wiens, J. A. (2016). Ecological challenges and conservation conundrums: Essays and reflections for a changing world. Wiley.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Wiens, John A. Ecological Challenges and Conservation Conundrums: Essays and Reflections for a Changing World. West Sussex, England: Wiley, 2016.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Wiens, John A. Ecological Challenges and Conservation Conundrums: Essays and Reflections for a Changing World. Wiley, 2016.
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