Kumar, K. (1984). Reference service (4th.). Vikas.
Lua i Stíl Chicago (17ú heag.)Kumar, Krishan. Reference Service. 4th. New Delhi: Vikas, 1984.
Lua MLA (9ú heag.)Kumar, Krishan. Reference Service. 4th. Vikas, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.