Lua APA (7ú heag.)
Datt, R., & K.P.M. Sundharam. (2003). Services marketing (48th ed.). S. Chand.
Lua i Stíl Chicago (17ú heag.)
Datt, Ruddar, agus K.P.M. Sundharam. Services Marketing. 48th ed. New Delhi: S. Chand, 2003.
Lua MLA (9ú heag.)
Datt, Ruddar, agus K.P.M. Sundharam. Services Marketing. 48th ed. S. Chand, 2003.
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