APA استشهاد

Gopalakrishnan, N. S. A. (2009). Principles of intellectual property. Eastern books.

استشهاد بنمط شيكاغو

Gopalakrishnan, N S Agitha. Principles of Intellectual Property. Lucknow: Eastern books, 2009.

MLA استشهاد

Gopalakrishnan, N S Agitha. Principles of Intellectual Property. Eastern books, 2009.