APA
Narayanan P., . (1998). Patent Law. Eastern Law House, Calcutta: .
Chicago
Narayanan P, . 1998. Patent Law. Eastern Law House, Calcutta: .
Harvard
Narayanan P., . (1998). Patent Law. Eastern Law House, Calcutta: .
MLA
Narayanan P, . Patent Law. Eastern Law House, Calcutta: . 1998.