(2000). UPSC 50th Annual Report. UPSC.
Chicago Style aipamenaUPSC 50th Annual Report. New Delhi: UPSC, 2000.
MLA aipamenaUPSC 50th Annual Report. UPSC, 2000.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
(2000). UPSC 50th Annual Report. UPSC.
Chicago Style aipamenaUPSC 50th Annual Report. New Delhi: UPSC, 2000.
MLA aipamenaUPSC 50th Annual Report. UPSC, 2000.