Mah, D.-K., Bellin-Mularski, N. & Ifenthaler, D., 
01.01.2016, 
Foundation of Digital Badges and Micro-Credentials: Demonstrating and Recognizing Knowledge and Competencies. Ifenthaler, D., Bellin-Mularski, N. & Mah, D.-K. (Hrsg.). 
Springer International Publishing, 
S. 511-517 7 S.Publikation: Beiträge in Sammelwerken › Kapitel › begutachtet