APA (7 वां संस्करण) प्रशस्ति पत्र

Narayanan. P. (2017). Law of Trade Marks and Passing Off. Eastern Book Company Pvt Ltd.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Narayanan. P. Law of Trade Marks and Passing Off. Lucknow: Eastern Book Company Pvt Ltd, 2017.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Narayanan. P. Law of Trade Marks and Passing Off. Eastern Book Company Pvt Ltd, 2017.