APA
Bhalla Sandeep,, . (1997). The patents and trade marks cases digest 1981-1997. Delhi: Patents & Trade Mark.
Chicago
Bhalla Sandeep,, . 1997. The patents and trade marks cases digest 1981-1997. Delhi: Patents & Trade Mark.
Harvard
Bhalla Sandeep,, . (1997). The patents and trade marks cases digest 1981-1997. Delhi: Patents & Trade Mark.
MLA
Bhalla Sandeep,, . The patents and trade marks cases digest 1981-1997. Delhi: Patents & Trade Mark. 1997.