Singh, R. (1996). Service: Heart of hospitality. Shipra.
Lua i Stíl Chicago (17ú heag.)Singh, R. Service: Heart of Hospitality. Delhi: Shipra, 1996.
Lua MLA (9ú heag.)Singh, R. Service: Heart of Hospitality. Shipra, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.