Gaya APA

ZEITHAML, V, A., BITNER, M, J. (2018). SERVICES MARKETING; Integrating Customer Focus Across the Firm (7th). New York: MCGRAW-HILL.

Gaya MLA

ZEITHAML, Valarie, A.., BITNER, Mary, Jo. "SERVICES MARKETING; Integrating Customer Focus Across the Firm". 7th New York: MCGRAW-HILL, 2018. Text.