Hutwelker, R., & Hutwelker, R. (2019). Six Sigma Green Belt Certification Project: Identification, Implementation and Evaluation (1st ed. 2019.). Springer International Publishing : Imprint: Springer. https://doi.org/10.1007/978-3-030-31915-1
Παραπομπή σε μορφή Chicago (17η εκδ.)Hutwelker, Reiner, και Reiner Hutwelker. Six Sigma Green Belt Certification Project: Identification, Implementation and Evaluation. 1st ed. 2019. Cham: Springer International Publishing : Imprint: Springer, 2019. https://doi.org/10.1007/978-3-030-31915-1.
Παραπομπή σε μορφή MLA (8th εκδ.)Hutwelker, Reiner, και Reiner Hutwelker. Six Sigma Green Belt Certification Project: Identification, Implementation and Evaluation. 1st ed. 2019. Springer International Publishing : Imprint: Springer, 2019. https://doi.org/10.1007/978-3-030-31915-1.
