APA
Narayanan P., . (1999). Patent law. Eastern Law House, Calcutta: .
Chicago
Narayanan P, . 1999. Patent law. Eastern Law House, Calcutta: .
Harvard
Narayanan P., . (1999). Patent law. Eastern Law House, Calcutta: .
MLA
Narayanan P, . Patent law. Eastern Law House, Calcutta: . 1999.