Rao, K. R. M. (2011). Services Marketing. Pearson.
Lua i Stíl Chicago (17ú heag.)Rao, K. Ram Mohan. Services Marketing. Noida: Pearson, 2011.
Lua MLA (9ú heag.)Rao, K. Ram Mohan. Services Marketing. Pearson, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.