SpringerLink (Online service), Pries-Heje, J., & Messnarz, R. (2011). Systems, software and service process improvement: 18th European conference, EuroSPI 2011, Roskilde, Denmark, June 27-29, 2011. Proceedings. Springer Berlin Heidelberg. https://doi.org/10.1007/978-3-642-22206-1
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service), Jan Pries-Heje, και Richard Messnarz. Systems, Software and Service Process Improvement: 18th European Conference, EuroSPI 2011, Roskilde, Denmark, June 27-29, 2011. Proceedings. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. https://doi.org/10.1007/978-3-642-22206-1.
Παραπομπή σε μορφή MLA (9th εκδ.)SpringerLink (Online service), et al. Systems, Software and Service Process Improvement: 18th European Conference, EuroSPI 2011, Roskilde, Denmark, June 27-29, 2011. Proceedings. Springer Berlin Heidelberg, 2011. https://doi.org/10.1007/978-3-642-22206-1.