Gaya APA

ZEITHAML, V, A., BITNER, M, J. (2006). SERVICES MARKETING (4th). New York: MCGRAW-HILL.

Gaya MLA

ZEITHAML, Valarie, A.., BITNER, Mary, Jo. "SERVICES MARKETING". 4th New York: MCGRAW-HILL, 2006. Text.