APA (7e ed.) Bronvermelding

ebrary, Inc, Sigala, M., & Christou, E. (2006). Global trends and challenges in services. Emerald Group Publishing.

Chicago (17e ed.) Bronvermelding

ebrary, Inc, Marianna Sigala, en Evangelos Christou. Global Trends and Challenges in Services. Bradford, England: Emerald Group Publishing, 2006.

MLA (9e ed.) Bronvermelding

ebrary, Inc, et al. Global Trends and Challenges in Services. Emerald Group Publishing, 2006.