एपीए उद्धरण

Gopalakrishnan, N. S. (2009). Principles of Intellectual Property. Eastern Book Company.

शिकागो स्टाइल उद्धरण

Gopalakrishnan, N S. Principles of Intellectual Property. Lucknow: Eastern Book Company, 2009.

एमएलए उद्धरण

Gopalakrishnan, N S. Principles of Intellectual Property. Eastern Book Company, 2009.