Kochar, R. S. (1998). Library classification systems. Commonwealth.
Chicago Style (17th ed.) ZitazioaKochar, R. S. Library Classification Systems. New Delhi: Commonwealth, 1998.
MLA (9th ed.) ZitazioaKochar, R. S. Library Classification Systems. Commonwealth, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.