Zawacki-Richter, Olaf, Wolfgang Müskens, Ulrike Krause, Uthman Alturki, and Ahmed Aldraiweesh. 2015. “Student Media Usage Patterns and Non-Traditional Learning in Higher Education”. The International Review of Research in Open and Distributed Learning 16 (2). https://doi.org/10.19173/irrodl.v16i2.1979.