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.