Chopra Sheetal & Taneja Akash. (2009). Patent Agent Examination (1st.). LexisNexis Butterworths.
Chicago Style aipamenaChopra Sheetal & Taneja Akash. Patent Agent Examination. 1st. Haryana: LexisNexis Butterworths, 2009.
MLA aipamenaChopra Sheetal & Taneja Akash. Patent Agent Examination. 1st. LexisNexis Butterworths, 2009.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.