Lua APA (7ú heag.)

Zeithaml, V. A. B. (2013). Services Marketing (6th.). McGraw Hill.

Lua i Stíl Chicago (17ú heag.)

Zeithaml, Valarie A; Bitner. Services Marketing. 6th. New Delhi: McGraw Hill, 2013.

Lua MLA (9ú heag.)

Zeithaml, Valarie A; Bitner. Services Marketing. 6th. McGraw Hill, 2013.

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