Cita APA (7th ed.)

Zeithaml,Valarie A, & Bitner, M. J. G. (2019). Services Marketing (7th.). McGraw Hill Education.

Cita Chicago (17th ed.)

Zeithaml,Valarie A, i Mary Jo; Gremler Bitner. Services Marketing. 7th. Chennai: McGraw Hill Education, 2019.

Cita MLA (9th ed.)

Zeithaml,Valarie A, i Mary Jo; Gremler Bitner. Services Marketing. 7th. McGraw Hill Education, 2019.