ZEITHAML VALARIE A. (2003). SERVICES MARKETING (3RD.). TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED.
Chicago-čujuhus (17. p.)ZEITHAML VALARIE A. SERVICES MARKETING. 3RD. NEW DELHI: TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 2003.
MLA-čujuhus (9. p.)ZEITHAML VALARIE A. SERVICES MARKETING. 3RD. TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 2003.
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