एपीए उद्धरण

Kumar P S G. (2012). Colon classification (6.). ESS ESS publication.

शिकागो स्टाइल उद्धरण

Kumar P S G. Colon Classification. 6. New Delhi: ESS ESS publication, 2012.

एमएलए उद्धरण

Kumar P S G. Colon Classification. 6. ESS ESS publication, 2012.