Blokdijk, G. (2009). Service level agreement: 100 success secrets : SLA service level agreements, service level management topics and much more. Lightening Source UK.
Chicago-Zitierstil (17. Ausg.)Blokdijk, Gerard. Service Level Agreement: 100 Success Secrets : SLA Service Level Agreements, Service Level Management Topics and Much More. [Milton Keynes, UK: Lightening Source UK, 2009.
MLA-Zitierstil (9. Ausg.)Blokdijk, Gerard. Service Level Agreement: 100 Success Secrets : SLA Service Level Agreements, Service Level Management Topics and Much More. Lightening Source UK, 2009.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.