Gaya APA

Wittmann, E, C. et al (2016). Design Science and Its Importance in the German Mathematics Educational Discussion (1st ed. 2016). : Springer International Publishing.

Gaya MLA

Wittmann, Erich, Christian. et al. "Design Science and Its Importance in the German Mathematics Educational Discussion". 1st ed. 2016 : Springer International Publishing, 2016. Electronic Resource.