Ramankutty, A. (2023). Working plan Nilambur (North) Forest Division (2001-02 to 2010–11). Working Plan Circle, Kerala.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRamankutty, A. Working Plan Nilambur (North) Forest Division (2001-02 to 2010–11). Working Plan Circle, Kerala, 2023.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRamankutty, A. Working Plan Nilambur (North) Forest Division (2001-02 to 2010–11). Working Plan Circle, Kerala, 2023.
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