APA-referens (7:e uppl.)

Sherman, H. D., & Zhu, J. (2006). Service Productivity Management: Improving Service Performance using Data Envelopment Analysis (DEA). Springer US. https://doi.org/10.1007/0-387-33231-6

Chicago-referens (17:e uppl.)

Sherman, H. David, och Joe Zhu. Service Productivity Management: Improving Service Performance Using Data Envelopment Analysis (DEA). Boston, MA: Springer US, 2006. https://doi.org/10.1007/0-387-33231-6.

MLA-referens (9:e uppl.)

Sherman, H. David, och Joe Zhu. Service Productivity Management: Improving Service Performance Using Data Envelopment Analysis (DEA). Springer US, 2006. https://doi.org/10.1007/0-387-33231-6.