Cita APA (7th ed.)

ZEITHAML VALARIE A. (2003). SERVICES MARKETING (3RD.). TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED.

Cita Chicago (17th ed.)

ZEITHAML VALARIE A. SERVICES MARKETING. 3RD. NEW DELHI: TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 2003.

Cita MLA (9th ed.)

ZEITHAML VALARIE A. SERVICES MARKETING. 3RD. TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 2003.