Jha, S. (2000). Services marketing (4th rev. ed.). HPH.
Chicago Style aipamenaJha, S.M. Services Marketing. 4th rev. ed. Mumbai: HPH, 2000.
MLA aipamenaJha, S.M. Services Marketing. 4th rev. ed. HPH, 2000.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.